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Finding the Fourth Proportional to 574.55, 861.29 and 281.87

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Solution

The fourth proportional to 574.55, 861.29 and 281.87 is: 422.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.55 : 861.29 = 281.87 : x
  2. Step 2: Convert to fraction form
    574.55/861.29 = 281.87/x
  3. Step 3: Cross multiply
    574.55x = 861.29 × 281.87
  4. Step 4: Simplify right side
    574.55x = 242,770.40
  5. Step 5: Solve for x
    x = 242,770.40/574.55
  6. Step 6: Final answer
    x = 422.54

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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.