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Finding the Fourth Proportional to 398,997.28, 598,593.52 and 132,757.28

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Solution

The fourth proportional to 398,997.28, 598,593.52 and 132,757.28 is: 199,168.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,997.28 : 598,593.52 = 132,757.28 : x
  2. Step 2: Convert to fraction form
    398,997.28/598,593.52 = 132,757.28/x
  3. Step 3: Cross multiply
    398,997.28x = 598,593.52 × 132,757.28
  4. Step 4: Simplify right side
    398,997.28x = 79,467,647,540.83
  5. Step 5: Solve for x
    x = 79,467,647,540.83/398,997.28
  6. Step 6: Final answer
    x = 199,168.39

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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.