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Finding the Fourth Proportional to 391,787.69, 587,902.96 and 167,126.90

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Solution

The fourth proportional to 391,787.69, 587,902.96 and 167,126.90 is: 250,784.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,787.69 : 587,902.96 = 167,126.90 : x
  2. Step 2: Convert to fraction form
    391,787.69/587,902.96 = 167,126.90/x
  3. Step 3: Cross multiply
    391,787.69x = 587,902.96 × 167,126.90
  4. Step 4: Simplify right side
    391,787.69x = 98,254,396,475.02
  5. Step 5: Solve for x
    x = 98,254,396,475.02/391,787.69
  6. Step 6: Final answer
    x = 250,784.80

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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.