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Finding the Fourth Proportional to 249.49, 374.17 and 87.13

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Solution

The fourth proportional to 249.49, 374.17 and 87.13 is: 130.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.49 : 374.17 = 87.13 : x
  2. Step 2: Convert to fraction form
    249.49/374.17 = 87.13/x
  3. Step 3: Cross multiply
    249.49x = 374.17 × 87.13
  4. Step 4: Simplify right side
    249.49x = 32,601.43
  5. Step 5: Solve for x
    x = 32,601.43/249.49
  6. Step 6: Final answer
    x = 130.67

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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.