 | Charles Davies - Algebra - 1891 - 312 pages
...D, having such values that B=D A C' then A is said to have the same ratio to B that 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, compared together two and two, they are said... | |
 | Electrical engineering - 1876 - 352 pages
...where the wires diverge and meet again. When the resistances of A, B, C, and D are so related that the ratio of A to B is equal to the ratio of C to D, then the points E and F are at the same level or the same potential with regard to electricity, and... | |
 | Cambridge Philosophical Society - Philosophy - 1898 - 366 pages
...the measure of the ratio of A to B is the same as the measure of the ratio of C to D, and therefore the ratio of A to B is equal to the ratio of C to D. Hence any of the preceding propositions in which it has been proved that the scale of A, B is the same... | |
 | Euclid - Euclid's Elements - 1908 - 196 pages
...less than. > Not greater than.' A~B The difference of A and B. A : B The ratio of A to B. A : B=C : D The ratio of A to B is equal to the ratio of C to D. -X- Compounded with. (Art. 191.) -. Aggregated with. (Art. 194.) SECTION I. PROPOSITIONS 1—8. ON... | |
 | Walter Roy Laird, Sophie Roux - Science - 2008 - 320 pages
...short: if a double ratio comes from a speed B and a triple ratio from a speed A, then, permutatim, the ratio of A to B is equal to the ratio of 3:1 to 2:1. We note that Etienne Gaudet copies this "demonstration" without comment.26 What Dumbleton... | |
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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. 
