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Finding the Third Proportional to 261,632 and 392,448

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Solution

The third proportional to 261,632 and 392,448 is: 588,672

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,632 : 392,448 = 392,448 : x
  2. Step 2: Convert to fraction form
    261,632/392,448 = 392,448/x
  3. Step 3: Cross multiply
    261,632x = 392,448 × 392,448
  4. Step 4: Simplify right side
    261,632x = 154,015,432,704
  5. Step 5: Solve for x
    x = 154,015,432,704/261,632
  6. Step 6: Final answer
    x = 588,672

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.