Finding the Third Proportional to 528 and 642
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Solution
The third proportional to 528 and 642 is: 780.61
Step by Step Solution
- Step 1: Write the proportion equation
528 : 642 = 642 : x - Step 2: Convert to fraction form
528/642 = 642/x - Step 3: Cross multiply
528x = 642 × 642 - Step 4: Simplify right side
528x = 412,164 - Step 5: Solve for x
x = 412,164/528 - Step 6: Final answer
x = 780.61
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These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.