 | George Hervey Hallett, Robert Franklin Anderson - Algebra - 1917 - 432 pages
...called bd the terms of the proportion. Note. A proportion is often written я : h = с. : d ; read, the ratio of a to b is equal to the ratio of с to d. An old form and one less frequently used is a : ft : : с : d. 172. Extremes and means. The... | |
 | David Eugene Smith - Geometry, Plane - 1923 - 314 pages
...is often used. All three forms have the same meaning, and each is read "a is to b as c is to d," or "the ratio of a to b is equal to the ratio of c to d." 197. Terms. In a proportion the four quantities compared are called the terms. The first and third... | |
 | Steen Eiler Rasmussen - Architecture - 1964 - 260 pages
...is to the second as the second is to the whole. If we call the two parts a and b, respectively, then the ratio of a to b is equal to the ratio of b to a+b. This may sound somewhat complicated but is easily grasped when seen in diagram. Until recently... | |
 | Martin M. Zuckerman - Mathematics - 1985 - 406 pages
...proportion. DEFINITION A proportion is an equation of the form — = — bd A proportion says that the ratio of a to b is equal to the ratio of с to d. In Example 2, the equation is a proportion. Example 2 »> If - = -, find л-. Solution. Multiply... | |
 | Midhat J. Gazalé - Number theory - 2000 - 340 pages
...also have mc > nd, then a/b = c/d. The definition given by Eudoxus may thus be rephrased as follows: The ratio of a to b is equal to the ratio of c to d if, whatever multiples ma and mc are chosen, and whatever multiples nb and nd are chosen, then either... | |
 | Robert E. Krebs - Science, Medieval - 2004 - 352 pages
...interested in the "golden ratio" described in Divine Proportions as a : b = b : (a + b), that means the ratio of a to b is equal to the ratio of b to the sum of a and b. This "golden ratio" was aesthetically satisfying both mathematically and artistically,... | |
 | Mel Friedman, Lina Miceli, Robert Bell, Michael Lee, Sally Wood, Adel Arshaghi, Suzanne Coffield, Michael McIrvin, Anita Price Davis, Research & Education Association, George DeLuca, Joseph Fili, Marilyn Gilbert, Bernice E. Goldberg, Leonard Kenner - Study Aids - 2005 - 886 pages
...manipulate ratios given a set of constraints. Let A, B, C, and D be positive integers. Assume that the ratio of A to B is equal to the ratio of C to D. Find a possible value for A if the product of BC = 24 and D is odd. SOLUTION The quickest way to find... | |
 | American Heritage Dictionary - Reference - 2005 - 1054 pages
...milk, meat, or yeast. golden section (gol'den) The ratio between two numbers a and b chosen such that the ratio of a to b is equal to the ratio of a+b to a. Its value is approximately 1.618. Shapes with proportions equal to the golden section are... | |
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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. 
