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Finding the Third Proportional to 386,487 and 534,040

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Solution

The third proportional to 386,487 and 534,040 is: 737,925.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,487 : 534,040 = 534,040 : x
  2. Step 2: Convert to fraction form
    386,487/534,040 = 534,040/x
  3. Step 3: Cross multiply
    386,487x = 534,040 × 534,040
  4. Step 4: Simplify right side
    386,487x = 285,198,721,600
  5. Step 5: Solve for x
    x = 285,198,721,600/386,487
  6. Step 6: Final answer
    x = 737,925.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.