Finding the Third Proportional to 639 and 754.50
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Solution
The third proportional to 639 and 754.50 is: 890.88
Step by Step Solution
- Step 1: Write the proportion equation
639 : 754.50 = 754.50 : x - Step 2: Convert to fraction form
639/754.50 = 754.50/x - Step 3: Cross multiply
639x = 754.50 × 754.50 - Step 4: Simplify right side
639x = 569,270.25 - Step 5: Solve for x
x = 569,270.25/639 - Step 6: Final answer
x = 890.88
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These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.