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Finding the Fourth Proportional to 391,766.31, 587,304.90 and 155,275.02

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Solution

The fourth proportional to 391,766.31, 587,304.90 and 155,275.02 is: 232,775.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,766.31 : 587,304.90 = 155,275.02 : x
  2. Step 2: Convert to fraction form
    391,766.31/587,304.90 = 155,275.02/x
  3. Step 3: Cross multiply
    391,766.31x = 587,304.90 × 155,275.02
  4. Step 4: Simplify right side
    391,766.31x = 91,193,780,093.60
  5. Step 5: Solve for x
    x = 91,193,780,093.60/391,766.31
  6. Step 6: Final answer
    x = 232,775.96

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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.