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Finding the Fourth Proportional to 381,731.60, 572,597.40 and 132,438.80

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Solution

The fourth proportional to 381,731.60, 572,597.40 and 132,438.80 is: 198,658.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,731.60 : 572,597.40 = 132,438.80 : x
  2. Step 2: Convert to fraction form
    381,731.60/572,597.40 = 132,438.80/x
  3. Step 3: Cross multiply
    381,731.60x = 572,597.40 × 132,438.80
  4. Step 4: Simplify right side
    381,731.60x = 75,834,112,539.12
  5. Step 5: Solve for x
    x = 75,834,112,539.12/381,731.60
  6. Step 6: Final answer
    x = 198,658.20

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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.