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Finding the Fourth Proportional to 249.12, 372.87 and 157.86

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Solution

The fourth proportional to 249.12, 372.87 and 157.86 is: 236.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.12 : 372.87 = 157.86 : x
  2. Step 2: Convert to fraction form
    249.12/372.87 = 157.86/x
  3. Step 3: Cross multiply
    249.12x = 372.87 × 157.86
  4. Step 4: Simplify right side
    249.12x = 58,861.26
  5. Step 5: Solve for x
    x = 58,861.26/249.12
  6. Step 6: Final answer
    x = 236.28

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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.