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Finding the Fourth Proportional to 574.46, 861.89 and 418.43

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Solution

The fourth proportional to 574.46, 861.89 and 418.43 is: 627.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.46 : 861.89 = 418.43 : x
  2. Step 2: Convert to fraction form
    574.46/861.89 = 418.43/x
  3. Step 3: Cross multiply
    574.46x = 861.89 × 418.43
  4. Step 4: Simplify right side
    574.46x = 360,640.63
  5. Step 5: Solve for x
    x = 360,640.63/574.46
  6. Step 6: Final answer
    x = 627.79

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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.