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Finding the Fourth Proportional to 386,761.55, 580,129.55 and 159,049.28

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Solution

The fourth proportional to 386,761.55, 580,129.55 and 159,049.28 is: 238,568.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,761.55 : 580,129.55 = 159,049.28 : x
  2. Step 2: Convert to fraction form
    386,761.55/580,129.55 = 159,049.28/x
  3. Step 3: Cross multiply
    386,761.55x = 580,129.55 × 159,049.28
  4. Step 4: Simplify right side
    386,761.55x = 92,269,189,380.39
  5. Step 5: Solve for x
    x = 92,269,189,380.39/386,761.55
  6. Step 6: Final answer
    x = 238,568.68

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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.