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Finding the Fourth Proportional to 498,489.72, 687,912.31 and 272,135.22

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Solution

The fourth proportional to 498,489.72, 687,912.31 and 272,135.22 is: 375,544.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,489.72 : 687,912.31 = 272,135.22 : x
  2. Step 2: Convert to fraction form
    498,489.72/687,912.31 = 272,135.22/x
  3. Step 3: Cross multiply
    498,489.72x = 687,912.31 × 272,135.22
  4. Step 4: Simplify right side
    498,489.72x = 187,205,167,822.56
  5. Step 5: Solve for x
    x = 187,205,167,822.56/498,489.72
  6. Step 6: Final answer
    x = 375,544.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.