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Finding the Fourth Proportional to 249.96, 374.89 and 67.31

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Solution

The fourth proportional to 249.96, 374.89 and 67.31 is: 100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.96 : 374.89 = 67.31 : x
  2. Step 2: Convert to fraction form
    249.96/374.89 = 67.31/x
  3. Step 3: Cross multiply
    249.96x = 374.89 × 67.31
  4. Step 4: Simplify right side
    249.96x = 25,234.78
  5. Step 5: Solve for x
    x = 25,234.78/249.96
  6. Step 6: Final answer
    x = 100.95

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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.