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" In any proportion, the product of the means is equal to the product of the extremes. "
The Youth's Assistant in Theoretic and Practical Arithmetic: Designed for ... - Page 67
by Zadock Thompson - 1848 - 168 pages
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A Nurse's Guide to Dosage Calculation: Giving Medications Safely

Vicki Niblett - Medical - 2006 - 311 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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Fundamental Concepts of Mathematics, Volume 1

Steven K. Atiyah - Education - 2005 - 702 pages
...are called the extremes. If a/b =c/d, then multiplying both sides by bd would lead to ad = be, ie, the product of the means is equal to the product of the extremes. EXAMPLE 6.29 Given a/b = c/d. (1) Multiplying both sides of (1) by bd, we have: ad = be. (2) Dividing...
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Strategies for Success on the SAT: Mathematics Section

Lisa Muehle - Juvenile Nonfiction - 2006 - 240 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...
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