 | Joseph Ray - Arithmetic - 1880 - 420 pages
...Simple when both ratios are simple ; Compound when one or both ratios are compound. PRINCIPLES. — 1. In every proportion the product of the means is equal to the product of Hie extremes. 2. The product of the extremes divided by either mean, iritt give the other mean. < 3.... | |
 | Research & Education Association Editors, Ernest Woodward - Mathematics - 2012 - 1080 pages
...congruent angles. 10. AA = AA 11. Corresponding sides of similar triangles are in proportion. 12. In a proportion, the product of the means is equal to the product of the extremes. • PROBLEM 531 Using Ptolemy's Theorem show that if a anS b, with a ^ b, are chords of two arcs of... | |
 | Ann Faber, Gale Edgerton, Paul Karanevich - Mathematics - 1985 - 254 pages
...proportion amounts to multiplying the "means" (inner numbers) and the "extremes" (outer numbers). If the product of the means is equal to the product of the extremes, the ratios are equal. 2X2 = 4 1:2 2:4 1 X4 = 4 4 = 4, so that 1 :2 = 2:4 is a proportion. I Example... | |
 | The Editors of REA - Mathematics - 2013 - 112 pages
...c are called the means of the proportion. The single term d is called the fourth proportional. In a proportion, the product of the means is equal to the product of the extremes. Theorem 2 A proportion may be written by inversion. (If alb = eld, then bla = die.) Theorem 3 •i... | |
 | Joanne K. Price - Technology & Engineering - 1991 - 380 pages
...proportion. The inside terms (2nd and 3rd) are called the means of a proportion. For all proportions, the product of the means is equal to the product of the extremes. In other words, when the two inside terms are multiplied, the answer will be the same as when the two... | |
 | Brian Burrell - Mathematics - 1998 - 386 pages
...or as "/, = '//. The values b and c are referred to as the means; a and d are the extremes. In any proportion, the product of the means is equal to the product of the extremes. (This is also known as cross-multiplication.) THE RULE OF THREE "Do as you would be done by" is thought... | |
 | Haym Kruglak, John Moore, Ramon Mata-Toledo - Mathematics - 1998 - 508 pages
...of the proportion. The above proportion can be written in fractional form as a/b = c/d. Rule. In any proportion, the product of the means is equal to the product of the extremes. Ratio For instance, 3:4 = 6:8 is a proportion and the product of the means is (4)(6) or 24 and the... | |
 | Thomas J. Mathiesen - Music - 1999 - 832 pages
...proportion" (Kupionepoi; dvaXoyia), in which two middle terms form various ratios with the extremes and the product of the means is equal to the product of the extremes. This proportion is represented by 12:9:8:6, which embraces geometric proportion (12:8::9:6), harmonic... | |
 | Lisa Muehle - Study Aids - 2004 - 239 pages
...proportion. The relationship between w and x is proportional to the relationship between y and z. In any proportion, the product of the means is equal to the product of the extremes. In the proportion above, x • y = w • z. SAT PRACTICE: RATIO & PROPORTION (SIMPLE RATIOS) Of 200... | |
 | Vicki Niblett - Medical - 2006 - 338 pages
...proportion closest to the equal sign are called the means. The parts at either end are called the extremes. The product of the means is equal to the product of the extremes. I- — means- — 4 12 chocolates: 25 candies = X chocolates: 100 candies -extremes — Means = 25... | |
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In any proportion the product of the means is equal to the product of the extremes. 
