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Finding the Fourth Proportional to 285.38, 429.11 and 249.56

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Solution

The fourth proportional to 285.38, 429.11 and 249.56 is: 375.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.38 : 429.11 = 249.56 : x
  2. Step 2: Convert to fraction form
    285.38/429.11 = 249.56/x
  3. Step 3: Cross multiply
    285.38x = 429.11 × 249.56
  4. Step 4: Simplify right side
    285.38x = 107,087.44
  5. Step 5: Solve for x
    x = 107,087.44/285.38
  6. Step 6: Final answer
    x = 375.25

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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.