6-1 Proportions

# 6-1 Proportions - eg = The cross products of a proportion...

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Proportions Proportions Section 6-1

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ratio – a comparison of 2 quantities The ratio of a to b can be expressed as a:b or where b is not 0. b a
A special ratio often found in nature and used by artists and architects is the golden ratio . It is approximately 1: 1.618. The Fibonacci sequence is related to the golden ratio. Each term in the sequence is the sum of the 2 previous terms. (1,1,2,3,5,8,13,…)

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proportion – an equation stating that 2 ratios are equal

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Unformatted text preview: eg. = The cross products of a proportion are equal. ( The product of the means equals the product of the extremes.) 4 3 8 6 4 3 8 6 = mean mean extreme extreme Equality of Cross Products Equality of Cross Products For any numbers a and c and any nonzero numbers b and d , iff ad = bc . b a = d c Joke Time Joke Time How do you catch a “unique” rabbit? “Unique” up on him! How do you catch a “tame” rabbit? The “tame” way!...
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## This note was uploaded on 12/01/2011 for the course MATH 105 taught by Professor Towns during the Fall '10 term at BYU.

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6-1 Proportions - eg = The cross products of a proportion...

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