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Finding the Fourth Proportional to 499,168.31, 748,561.09 and 392,761.66

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Solution

The fourth proportional to 499,168.31, 748,561.09 and 392,761.66 is: 588,991.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,168.31 : 748,561.09 = 392,761.66 : x
  2. Step 2: Convert to fraction form
    499,168.31/748,561.09 = 392,761.66/x
  3. Step 3: Cross multiply
    499,168.31x = 748,561.09 × 392,761.66
  4. Step 4: Simplify right side
    499,168.31x = 294,006,096,319.81
  5. Step 5: Solve for x
    x = 294,006,096,319.81/499,168.31
  6. Step 6: Final answer
    x = 588,991.91

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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.