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Finding the Fourth Proportional to 261,529.60, 391,372.80 and 239,411.20

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Solution

The fourth proportional to 261,529.60, 391,372.80 and 239,411.20 is: 358,273.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,529.60 : 391,372.80 = 239,411.20 : x
  2. Step 2: Convert to fraction form
    261,529.60/391,372.80 = 239,411.20/x
  3. Step 3: Cross multiply
    261,529.60x = 391,372.80 × 239,411.20
  4. Step 4: Simplify right side
    261,529.60x = 93,699,031,695.36
  5. Step 5: Solve for x
    x = 93,699,031,695.36/261,529.60
  6. Step 6: Final answer
    x = 358,273.14

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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.