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Finding the Fourth Proportional to 386,687.28, 580,115.16 and 158,984.55

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Solution

The fourth proportional to 386,687.28, 580,115.16 and 158,984.55 is: 238,511.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,687.28 : 580,115.16 = 158,984.55 : x
  2. Step 2: Convert to fraction form
    386,687.28/580,115.16 = 158,984.55/x
  3. Step 3: Cross multiply
    386,687.28x = 580,115.16 × 158,984.55
  4. Step 4: Simplify right side
    386,687.28x = 92,229,347,660.78
  5. Step 5: Solve for x
    x = 92,229,347,660.78/386,687.28
  6. Step 6: Final answer
    x = 238,511.46

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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.