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Finding the Fourth Proportional to 574.38, 861.36 and 249.66

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Solution

The fourth proportional to 574.38, 861.36 and 249.66 is: 374.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.38 : 861.36 = 249.66 : x
  2. Step 2: Convert to fraction form
    574.38/861.36 = 249.66/x
  3. Step 3: Cross multiply
    574.38x = 861.36 × 249.66
  4. Step 4: Simplify right side
    574.38x = 215,047.14
  5. Step 5: Solve for x
    x = 215,047.14/574.38
  6. Step 6: Final answer
    x = 374.40

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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.