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Finding the Fourth Proportional to 272,358.80, 408,538.20 and 132,390.80

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Solution

The fourth proportional to 272,358.80, 408,538.20 and 132,390.80 is: 198,586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,358.80 : 408,538.20 = 132,390.80 : x
  2. Step 2: Convert to fraction form
    272,358.80/408,538.20 = 132,390.80/x
  3. Step 3: Cross multiply
    272,358.80x = 408,538.20 × 132,390.80
  4. Step 4: Simplify right side
    272,358.80x = 54,086,699,128.56
  5. Step 5: Solve for x
    x = 54,086,699,128.56/272,358.80
  6. Step 6: Final answer
    x = 198,586.20

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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.