 | Thomas Malton - 1774 - 484 pages
...either greater or lefs than E to F; the Ratio of A to B is alfo greater or lefs, than E to Ft For, the Ratio of A to B is equal to the Ratio of C to Dl therefore, their Ratios are the fame, in refpect to any other. -Note. By miftake, the 7th and 8th... | |
 | Euclid, John Playfair - Euclid's Elements - 1795 - 462 pages
...the laft definition, the ratio of A to C is compounded of the ratios of A to B, and of B to C ; but the ratio of A to B is equal to the ratio of B to C, becaufe A, B, C are continual proportionals ; therefore the ratio of A to C,by this definition,... | |
 | Maria Gaetana Agnesi - Calculus - 1801 - 724 pages
...proportion of three- or four terms, is thus expreffed : a . b :: b . c, when there are three terms; that is, the ratio of a to b is equal to the ratio of b to c. Alfo, a . b '.'. c . d means, that a is to b as c is to d. Laftly, the fign oo denotes infinite,... | |
 | Charles Hutton - Mathematics - 1811 - 406 pages
...o^ : R : : c : D. But as p and o^are equal, by supposition, they have the same ratio to R, that is, the ratio of A to B is equal to the ratio of c to D, or A : B : : c : D. o^ ED Corol. 1. When the two means, namely, the second and third terms, are equal,... | |
 | Charles Hutton - Mathematics - 1816 - 610 pages
...Q : a : : c : D. But as r and q are equal, by supposition. they have the same ratio to R, that is, the ratio of A to B is equal to the ratio of c to D, or A - B : : c : D. q E. o. Carol. \ . When the two means, namely, the second and third terms, are... | |
 | Charles Hutton - Mathematics - 1822 - 616 pages
...<l : R : : c : D. But as t and <j are equal, by supposition, they have the same ratio to R, that is, the ratio of A to B is equal to the ratio of c to D, or A : B : : c : DQEI). Carol. 1. When the two means, namely, the second and third terms, are equal,... | |
 | Adrien Marie Legendre - Geometry - 1836 - 394 pages
...values that —is equal to—,, then A is said to have the same ratio AC to B, th.it C has to D, or the ratio of A to B is equal to the ratio of C 'to D. When four quantities have this relation to .each other, they are said to be in proportion. To indicate... | |
 | William Whewell - 1837 - 226 pages
...Ratio is the relation of quantities in respect of proportion, so that if a, b, c, d be proportional, the ratio of a to b is equal to the ratio of c to d. *LEMMA 1. If magnitudes be proportionals according to the algebraical definition of proportion, they... | |
 | Andrew Bell - Euclid's Elements - 1837 - 290 pages
...the last definition, the ratio of A to C is compounded of the ratios of A to B, and of B to C ; hut the ratio of A to B is equal to the ratio of B to 0, because A, B, C, are continual proportionals ; therefore the ratio of A to C, by this definition,... | |
 | Algebra - 1838 - 372 pages
...D. When four quantities have this relation to each other, they are said to be in proportion. Hence, proportion is an equality of ratios. To express that...the ratio of A to B is equal to the ratio of C to 1), we write the quantities thus, A : B : : C : D. and read, A is to B, as C to D. The quantities which... | |
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To express that the ratio of A to B is equal to the ratio of C to D, we write the quantities thus : A : B : : C : D ; and read, A is to B as C to D. 
