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Four quantities are said to be Proportional, when the ratio of the first to the second, is the same as the ratio of the third to the fourth.
A treatise on mercantile and practical arithmetic - Σελίδα 138
των John Penrose (teacher of arithmetic.) - 1824 - 300 σελίδες
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο

## Mathematics: Compiled from the Best Authors and Intended to be the ..., Τόμος 1

1801
...discontinued geometrical proportion ; for •£-= '•£ — 2, but \- = 8. Four numbers are directly proportional, when the ratio of the first to the second is the same as that of the third to die fourth. As 2 : 4 : : 3 : 6. Four numbers are said to be recipri*ally or inversely...

## A Course of Mathematics ...: Composed for the Use of the Royal Military ...

Charles Hutton - 1811
...three quantities A (2), B (4), c (8), where -*- = -f = 2, both the same ratio. 19. Four quantities are said to be Proportional, when the ratio of the first to die second, is the same as the ratio of the third to the fourth. As of the four, A (2), B (4), c (5),...

## A Course of Mathematics: For the Use of Academies as Well as Private Tuition

Charles Hutton - 1812
...that of 6 to 4 is £ or £ ; 5ec. 77. Proportion is an equality of ratios. Thus, 78. Three quantities are said to be Proportional, when the ratio of the first to the second is equal to the ratio of the second to the third. As of the three quantities A (2), B (4), c (8), where...

## A System of Arithmetic

Samuel Webber - 1812 - 248 σελίδες
...16, 8, are in discontinued geometrical proportion ; for £=y=2, but *^=8. Four numbers are directly proportional, when the ratio of the first to the second is the same, as that of the third to the fourth. As 2 : 4 : : 3 : 6. Four numbers are said to be reciprocally, or inversely...

## A Course of Mathematics: In Two Volumes : for the Use of Academies ..., Τόμος 1

Charles Hutton - 1816
...three quantities A (2), a (4), c (8), where £ = { = 2, both the same tatio. 79. Four quantities arc said to be Proportional, when the ratio of the first to the second, is the same as the ratio of the third to the fourth. As of the four, A (2), B (4), c (5), D < 10), where \$ c= if = 3, both the...

## A Course of Mathematics: For the Use of Academies, as Well as Private Tuition

Charles Hutton - 1818
...the three quantities A (2), a (4), c (8), where 4 = f = 2, both the same ratio. 79. Four quantities are said to be Proportional, when the ratio of the first to the second, is the same as the ratio of the third to the fourth. As of the four, A (2),B (4), c (5), D (10), where | = ij' = 2, both the same...

## Elements of Science and Art: Being a Familiar Introduction to ..., Τόμος 2

John Imison - 1822
...is obtained by dividing the consequent by the antecedent. 54. Three magnitudes or quantities, A,B,C, are said to be proportional, when the ratio of the first to the second is the same as that of the second to the third. Thus, 2, 4, 8, are proportional, because 4> is contained in 8 as many...

## A New and Concise System of Arithmetick: Containing Vulgar, Decimal, and ...

Beriah Stevens - 1822 - 423 σελίδες
...arising from the division of the wntecedent 1, by the consequent 2, viz. i. Four numbers are siiid to be proportional when the ratio of the first to the second is the same as that of the tliii'd to the fourth ; and the proportional numbers are usually distinguished from one...

## A Course of Mathematics: For the Use of Academies, as Well as Private ...

Charles Hutton - 1822
...and the ratio of 8 to 20 is ,^=|. 77. Proportion is an equality of ratios. Thua, 78. Three quantities are said to be Proportional, when the ratio of the first to the second, is equal to the ratio of the second to the third. As of the three quantities A (2), B (4), c (8), where...

## The operative mechanic, and British machinist

...obtained by dividing the consequent by the antecedent. 89. Three magnitudes or quantities, A, 11, (.', are said to be proportional, when the ratio of the first to the second is the same as that of the second to the third. Thus, 2, 4, 8, are proportional, because 4 is contained in 8 as many...