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Finding the Fourth Proportional to 391,731.39, 587,639.21 and 167,115.56

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Solution

The fourth proportional to 391,731.39, 587,639.21 and 167,115.56 is: 250,691.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,731.39 : 587,639.21 = 167,115.56 : x
  2. Step 2: Convert to fraction form
    391,731.39/587,639.21 = 167,115.56/x
  3. Step 3: Cross multiply
    391,731.39x = 587,639.21 × 167,115.56
  4. Step 4: Simplify right side
    391,731.39x = 98,203,651,883.33
  5. Step 5: Solve for x
    x = 98,203,651,883.33/391,731.39
  6. Step 6: Final answer
    x = 250,691.30

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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.