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Βιβλία Βιβλία 31 - 40 από 172 για In any proportion, the product of the means equals the product of the extremes..
" In any proportion, the product of the means equals the product of the extremes. "
The New Normal Written Arithmetic: Designed for Common Schools, Normal ... - Σελίδα 293
των Edward Brooks - 1877 - 421 σελίδες
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Regents Examination Papers

University of the State of New York. Examination dept - 1895
...If 60 bushels of wheat cost $36, what is the price a bushel? 9 Show that if four quantities are in proportion the product of the means equals the product of the extremes. Mention one application of this principle. 10 Compare the United States rule for partial payments with...

Plane and Solid Geometry

Wooster Woodruff Beman, David Eugene Smith - 1895 - 320 σελίδες
...From - = -> it follows, by multiplying equals by bd, that 2. ad = bc. Hence, If four numbers are in proportion, the product of the means equals the product of the extremes. Ax. 6 If four lines are in proportion, the rectangle of the means equals the rectangle of the extremes....

The Werner Arithmetic, Oral and Written, Book Two, Parts I and II, Βιβλίο 2

Frank H. Hall - 1896 - 288 σελίδες
...terms of a proportion are called the extremes, and the second and third terms the means. In every true proportion, the product of the means equals the product of the extremes. 78. Per cent means hundredth or hundredths. 1 per cent is Tттп 9 per cent is T?ff; 200 per cent...

The Werner Arithmetic: Oral and Written, Τόμος 2

Frank H. Hall - 1896
...terms of a proportion are called the extremes> aad the second and third terms the means. In every true proportion, the product of the means equals the product of the extremes. 78. Per cent means hundredth or hundredths. 1 per cent is T ^j; 9 per cent is T ? 5 ; 200 per cent...

A Textbook on Plumbing, Heating, and Ventilation, Τόμος 5

1897
...the different terms to decimals: 6f =6.75. 3£=3.5. (a) 6.75 ft. : 3.5 ft. :: x Ib. : 37.45 Ib. Since in every proportion the product of- the means equals the product of the extremes, we have 3. 5. r = 6.75 X 37.45. 3. 5^r =252. 7875. 252.7875 . ,, x = - - — = 72.225 Ib. Ans. 3.5...

The Rand-McNally Practical Arithmetic: Complete for All Ordinary Purposes

Edwin Crawford Hewett - 1897 - 362 σελίδες
...and the other pair the mean terms, of that proportion. Hence, we see the grand principle that: In any proportion the product of the means equals the product of the extremes. On this principle we can always find any term of a proportion when the other three terms are given....

Lippincott's Practical Arithmetic: Embracing the Science and Practical ...

James Morgan Rawlins - 1899 - 437 σελίδες
...interest, at 5%, of from Sept. 1, 1894, to the present time. 61. Show that if four quantities are in proportion the product of the means equals the product of the extremes. 62. How much is due Aug. 15, 1893, 011 an interest-bearing promissory note for $250, dated Buffalo,...

Elementary School Mathematics by Grades: Arithmetic, geometry, and algebra ...

William Estabrook Chancellor - 1902 - 176 σελίδες
...the papei black ALGEBRA DEVELOPMENT OF THE SOLUTION In the proportion we have one great principle : The product of the means equals the product of the extremes. In the equation also w^nave one great principle : Either member equals the other member. We may do to...

A First Book of Algebra

John William Hopkins, Patrick Healy Underwood - 1904 - 245 σελίδες
...articles, the fewer the number of articles that can be bought for the given sum of money. 110. In a proportion the product of the means equals the product of the extremes. This may be shown as follows : Let the proportion be a : b = с : d, HMultiply by bd, ad = bc. Example...

School Science and Mathematics, Τόμος 21

1921
...63.9/92.3 without simplifying the second fraction? The answer leads to the First Proposition : In any proportion the product of the means equals the product of the extremes. With this as a fundamental proposition I write on the blackboard all the possible proportions that...




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