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Finding the Fourth Proportional to 574.09, 861.29 and 281.57

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Solution

The fourth proportional to 574.09, 861.29 and 281.57 is: 422.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.09 : 861.29 = 281.57 : x
  2. Step 2: Convert to fraction form
    574.09/861.29 = 281.57/x
  3. Step 3: Cross multiply
    574.09x = 861.29 × 281.57
  4. Step 4: Simplify right side
    574.09x = 242,514.17
  5. Step 5: Solve for x
    x = 242,514.17/574.09
  6. Step 6: Final answer
    x = 422.43

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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.