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Finding the Fourth Proportional to 240.32, 331.61 and 157.57

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Solution

The fourth proportional to 240.32, 331.61 and 157.57 is: 217.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.32 : 331.61 = 157.57 : x
  2. Step 2: Convert to fraction form
    240.32/331.61 = 157.57/x
  3. Step 3: Cross multiply
    240.32x = 331.61 × 157.57
  4. Step 4: Simplify right side
    240.32x = 52,250.17
  5. Step 5: Solve for x
    x = 52,250.17/240.32
  6. Step 6: Final answer
    x = 217.42

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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.