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Finding the Fourth Proportional to 521,503.30, 781,270.80 and 486,073.90

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Solution

The fourth proportional to 521,503.30, 781,270.80 and 486,073.90 is: 728,193.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,503.30 : 781,270.80 = 486,073.90 : x
  2. Step 2: Convert to fraction form
    521,503.30/781,270.80 = 486,073.90/x
  3. Step 3: Cross multiply
    521,503.30x = 781,270.80 × 486,073.90
  4. Step 4: Simplify right side
    521,503.30x = 379,755,344,712.12
  5. Step 5: Solve for x
    x = 379,755,344,712.12/521,503.30
  6. Step 6: Final answer
    x = 728,193.56

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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.