Home / 521,127.40-781,691.10-311,002.60

Finding the Fourth Proportional to 521,127.40, 781,691.10 and 311,002.60

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Solution

The fourth proportional to 521,127.40, 781,691.10 and 311,002.60 is: 466,503.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,127.40 : 781,691.10 = 311,002.60 : x
  2. Step 2: Convert to fraction form
    521,127.40/781,691.10 = 311,002.60/x
  3. Step 3: Cross multiply
    521,127.40x = 781,691.10 × 311,002.60
  4. Step 4: Simplify right side
    521,127.40x = 243,107,964,496.86
  5. Step 5: Solve for x
    x = 243,107,964,496.86/521,127.40
  6. Step 6: Final answer
    x = 466,503.90

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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.