Finding the Third Proportional to 642 and 654
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Solution
The third proportional to 642 and 654 is: 666.22
Step by Step Solution
- Step 1: Write the proportion equation
642 : 654 = 654 : x - Step 2: Convert to fraction form
642/654 = 654/x - Step 3: Cross multiply
642x = 654 × 654 - Step 4: Simplify right side
642x = 427,716 - Step 5: Solve for x
x = 427,716/642 - Step 6: Final answer
x = 666.22
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These problems maintain the same ratio (1.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.