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Finding the Fourth Proportional to 240.28, 331.50 and 136.72

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Solution

The fourth proportional to 240.28, 331.50 and 136.72 is: 188.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.28 : 331.50 = 136.72 : x
  2. Step 2: Convert to fraction form
    240.28/331.50 = 136.72/x
  3. Step 3: Cross multiply
    240.28x = 331.50 × 136.72
  4. Step 4: Simplify right side
    240.28x = 45,322.68
  5. Step 5: Solve for x
    x = 45,322.68/240.28
  6. Step 6: Final answer
    x = 188.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.