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Finding the Fourth Proportional to 399,751.31, 599,456.26 and 231,387.85

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Solution

The fourth proportional to 399,751.31, 599,456.26 and 231,387.85 is: 346,982.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,751.31 : 599,456.26 = 231,387.85 : x
  2. Step 2: Convert to fraction form
    399,751.31/599,456.26 = 231,387.85/x
  3. Step 3: Cross multiply
    399,751.31x = 599,456.26 × 231,387.85
  4. Step 4: Simplify right side
    399,751.31x = 138,706,895,170.44
  5. Step 5: Solve for x
    x = 138,706,895,170.44/399,751.31
  6. Step 6: Final answer
    x = 346,982.97

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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.