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Finding the Fourth Proportional to 508,736.80, 763,105.20 and 391,002.40

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Solution

The fourth proportional to 508,736.80, 763,105.20 and 391,002.40 is: 586,503.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,736.80 : 763,105.20 = 391,002.40 : x
  2. Step 2: Convert to fraction form
    508,736.80/763,105.20 = 391,002.40/x
  3. Step 3: Cross multiply
    508,736.80x = 763,105.20 × 391,002.40
  4. Step 4: Simplify right side
    508,736.80x = 298,375,964,652.48
  5. Step 5: Solve for x
    x = 298,375,964,652.48/508,736.80
  6. Step 6: Final answer
    x = 586,503.60

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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.