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Finding the Fourth Proportional to 398,807.56, 597,987.04 and 132,425.52

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Solution

The fourth proportional to 398,807.56, 597,987.04 and 132,425.52 is: 198,563.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,807.56 : 597,987.04 = 132,425.52 : x
  2. Step 2: Convert to fraction form
    398,807.56/597,987.04 = 132,425.52/x
  3. Step 3: Cross multiply
    398,807.56x = 597,987.04 × 132,425.52
  4. Step 4: Simplify right side
    398,807.56x = 79,188,744,725.26
  5. Step 5: Solve for x
    x = 79,188,744,725.26/398,807.56
  6. Step 6: Final answer
    x = 198,563.80

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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.