| Education Ministry of - 1882 - 292 pages
...diameter. SECTION X. 1. Define ratio and proportion. Show that when four numbers are in proportion the product of the means is equal to the product of the extremes. 2. Explain, as to a class, the object and the process of reducing fractions to a common denominator.... | |
| Henry Bartlett Maglathlin - Arithmetic - 1882 - 398 pages
...extremes, and 3 and 4 the means. Hence the following 348. Principles of Proportion. 1. In a proportion the product of the means is equal to the product of the extremes. 2. Hither extreme is equal to the product of the means divided by the other extreme. 3. Either mean... | |
| Research & Education Association Editors, Ernest Woodward - Mathematics - 2012 - 1080 pages
...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
...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
...following two ratios are proportionate: 24:4 and 18:3. 24 : 4 :: 18 : 3 AAAA 4x18 = 72 24x3 = 72 Since the product of the means is equal to the product of the extremes, the ratios are proportionate. Example 3: (Determining Proportions) Q Use cross multiplication to determine... | |
| Haym Kruglak, John Moore, Ramon Mata-Toledo - Mathematics - 1998 - 508 pages
...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... | |
| Brian Burrell - Mathematics - 1998 - 386 pages
...The resulting proportion is .*-.-! 18 ~ 3 This can be solved by cross-multiplication. (Recall that the product of the means is equal to the product of the extremes.) Thus 3x = 18 - 4 = 72, and therefore x = 7% = 24. doubled, the volume of the cube increases by a factor... | |
| 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
...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 vehicles in a parking... | |
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