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Finding the Fourth Proportional to 1,545.41, 2,318.49 and 449.78

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Solution

The fourth proportional to 1,545.41, 2,318.49 and 449.78 is: 674.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.41 : 2,318.49 = 449.78 : x
  2. Step 2: Convert to fraction form
    1,545.41/2,318.49 = 449.78/x
  3. Step 3: Cross multiply
    1,545.41x = 2,318.49 × 449.78
  4. Step 4: Simplify right side
    1,545.41x = 1,042,805.85
  5. Step 5: Solve for x
    x = 1,042,805.85/1,545.41
  6. Step 6: Final answer
    x = 674.78

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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.