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Finding the Fourth Proportional to 521,127.90, 781,691.85 and 311,003.10

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Solution

The fourth proportional to 521,127.90, 781,691.85 and 311,003.10 is: 466,504.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,127.90 : 781,691.85 = 311,003.10 : x
  2. Step 2: Convert to fraction form
    521,127.90/781,691.85 = 311,003.10/x
  3. Step 3: Cross multiply
    521,127.90x = 781,691.85 × 311,003.10
  4. Step 4: Simplify right side
    521,127.90x = 243,108,588,594.74
  5. Step 5: Solve for x
    x = 243,108,588,594.74/521,127.90
  6. Step 6: Final answer
    x = 466,504.65

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Similar ratio
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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.