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Chapter 2: 2A. (page 112)

Use cross products to determine whether each pair of ratios forms a proportion.

0.21.8,鈥�10.9

Short Answer

Expert verified

No, the pair of ratios0.21.8,鈥�10.9 do not form the proportion.

Step by step solution

01

Step-1. Define proportion.

If ab=cd, where a and d are extremes and b and c are the means, then in a proportion the product of the extremes is equal to the product of the means that is., ad=bc,鈥夆赌夆赌�b,d鈮�0.

02

Step-2. Determine the cross products.

Use cross products to determine whether two ratios form a proportion.

0.21.8=?10.90.9脳0.2=?1脳1.80.18鈮�1.8

03

Step-3. State the conclusion.

Since, the cross products are not equal, that is., 0.18鈮�1.8, therefore the ratios do not form the proportion.

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