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Finding the Fourth Proportional to 498,793.80, 748,881.90 and 393,731.40

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Solution

The fourth proportional to 498,793.80, 748,881.90 and 393,731.40 is: 591,142.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,793.80 : 748,881.90 = 393,731.40 : x
  2. Step 2: Convert to fraction form
    498,793.80/748,881.90 = 393,731.40/x
  3. Step 3: Cross multiply
    498,793.80x = 748,881.90 × 393,731.40
  4. Step 4: Simplify right side
    498,793.80x = 294,858,318,921.66
  5. Step 5: Solve for x
    x = 294,858,318,921.66/498,793.80
  6. Step 6: Final answer
    x = 591,142.71

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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.