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Evaluate subsequent proportion:
Example 2:
If 5 pounds of apples cost 80 cents, how much will 7 pounds cost?
Solution:
By using x for the cost of 7 pounds of apples, the subsequent proportion can be written.
5 pounds/7 pounds = 80 cents/ x
The product of the extremes is (5)(x) = 5x.
The product of the means is (7)(80) = 560.
Equate these two products which solve the resulting equation.
5x = 560
5x/5 = 560/5
x = 112
The unit of x is cents. Therefore, 7 pounds of apples cost 112 cents or $1.12.
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