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Finding the Fourth Proportional to 2,672.43, 4,008.61 and 724.62

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Solution

The fourth proportional to 2,672.43, 4,008.61 and 724.62 is: 1,086.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.43 : 4,008.61 = 724.62 : x
  2. Step 2: Convert to fraction form
    2,672.43/4,008.61 = 724.62/x
  3. Step 3: Cross multiply
    2,672.43x = 4,008.61 × 724.62
  4. Step 4: Simplify right side
    2,672.43x = 2,904,718.98
  5. Step 5: Solve for x
    x = 2,904,718.98/2,672.43
  6. Step 6: Final answer
    x = 1,086.92

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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.