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Βιβλία Βιβλία 1 - 10 από 164 για In every proportion the product of the means equals the product of the extremes..
" In every proportion the product of the means equals the product of the extremes. "
The Crittendon Commercial Arithmetic and Business Manual: Designed for the ... - Σελίδα 43
των John Groesbeck - 1871 - 344 σελίδες
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The Progressive Higher Arithmetic: For Schools, Academies, and Mercantile ...

Horatio Nelson Robinson - 1860 - 432 σελίδες
...the numerator of the second, which is the product of the extremes ; or, 15 X 4 = 20 X 3. Hence» i I. In every proportion the product of the means equals the product of the extremes. \giiin, take any three terms in proportion, aa 4 : 6=6 : 9 Then, since the product of the means equals...

Bryant and Stratton's Commercial Arithmetic: In Two Parts. Designed for the ...

Emerson Elbridge White - 1861 - 332 σελίδες
...have 8x6=12x4. But 8 and 6 are the means of the above proportion, and 12 and 4 its extremes. Hence, In every proportion, the product of the means equals the product of the extremes. Therefore, 1. If the product of the two means of a proportion be divided by either extreme, the quotient...

The Normal Written Arithmetic: By Analysis and Synthesis, Designed for ...

Edward Brooks - 1863
...A Compound Proportion is the comparison of compound ratios. PRINCIPLES OF PROPORTION. PROP. I. — In every proportion the product of the means equals the product of the extremes. DEM. — In the proportion 2 : 6 : : 4 : 12 we have J = T\ ; now if we multiply both these equals by...

A Written Arithmetic, for the Common and Higher Schools; to which is Adapted ...

Mrs. Electra Nobles Lincoln Walton - 1865 - 335 σελίδες
...performance of arithmetical examples by proportion depends upon the following important principle : — In every proportion the product of the means equals the product of the extremes. ILLUSTRATION. Writing the given proportion in a fraco . o . . A . Q tional form, we have j- = •£....

The Crittenden Commercial Arithmetic and Business Manual: Designed for the ...

John Groesbeck - 1869 - 348 σελίδες
...must be of the same kind, or such as may be reduced to the same denomination. We cannot compare 3\yds. with 6 dollars, but we can compare 3 yds. with 5 feet,...are enabled to find the fourth. SIMPLE PROPORTION, OB, RULE OF THREE. 86. A Simple Proportion is expressed by an equality of two ratios, and consists...

The Illustrative Practical Arithmetic by a Natural Method ...

George Augustus Walton, Electa Nobles Lincoln Walton - 1869 - 336 σελίδες
...NOTE TO THE TEACHER. — The principle given in Deduction 1 is sometimes enunciated thus : " In any proportion the product of the means equals the product of the extremes," which is not true when the terms are denominate numbers ; thus in the proportion 4 pk. : 5 pk. = $...

The Crittenden Commercial Arithmetic and Business Manual: Designed for the ...

John Groesbeck - 1870 - 348 σελίδες
...to 15, and is read, As 5 is to 15. 77. It may also be written in the form of a fraction : thus, lj6 expresses the relation of 4 to 16. 78. The two numbers...ratios, and consists of four terms. When three of the members of a proportion are given, two of them must be of the same kind, and the other must be of the...

The Illustrative Practical Arithmetic by a Natural Method with Dictation ...

George Augustus Walton - 1871 - 336 σελίδες
...NOTE TO THE TEACHER. — The principle given in Deduction 1 is some, times enunciated thus : " In any proportion the product of the means equals the product of the extremes," which is not true when tire terms are denominate numbers ; thus in the proportion 4 pk. : 5 pk. = $...

Crittenden Commercial Arithmetic ...

John Groesbeck - 1872
...and is read, As 2 is to 4, so is 10 to 20. The first and fourth terms are called the extremes; (he second and third, the means. 85. In every proportion...principle, having three terms of a proportion, we are ei.abled to find the fourth. SIMPLE PROPORTION, OR, RULE OF THREE. 86. A Simple Proportion is expressed...

The Illustrative Practical Arithmetic ...

George Augustus Walton - 1873
...NOTE TO THE TEACHER. — The principle given in Deduction 1 is sometimes enunciated thus : " In any proportion the product of the means equals the product of the extremes," which is not true when the terms are denominate numbers ; thus in the proportion 4 pk. : 5 pk. = $...




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