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Finding the Fourth Proportional to 239.44, 331.85 and 235.12

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Solution

The fourth proportional to 239.44, 331.85 and 235.12 is: 325.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.44 : 331.85 = 235.12 : x
  2. Step 2: Convert to fraction form
    239.44/331.85 = 235.12/x
  3. Step 3: Cross multiply
    239.44x = 331.85 × 235.12
  4. Step 4: Simplify right side
    239.44x = 78,024.57
  5. Step 5: Solve for x
    x = 78,024.57/239.44
  6. Step 6: Final answer
    x = 325.86

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.