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Finding the Fourth Proportional to 694,291.20, 958,003.20 and 392,478.72

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Solution

The fourth proportional to 694,291.20, 958,003.20 and 392,478.72 is: 541,553.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,291.20 : 958,003.20 = 392,478.72 : x
  2. Step 2: Convert to fraction form
    694,291.20/958,003.20 = 392,478.72/x
  3. Step 3: Cross multiply
    694,291.20x = 958,003.20 × 392,478.72
  4. Step 4: Simplify right side
    694,291.20x = 375,995,869,691.90
  5. Step 5: Solve for x
    x = 375,995,869,691.90/694,291.20
  6. Step 6: Final answer
    x = 541,553.56

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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.