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Finding the Fourth Proportional to 239.12, 356.76 and 231.44

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Solution

The fourth proportional to 239.12, 356.76 and 231.44 is: 345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.12 : 356.76 = 231.44 : x
  2. Step 2: Convert to fraction form
    239.12/356.76 = 231.44/x
  3. Step 3: Cross multiply
    239.12x = 356.76 × 231.44
  4. Step 4: Simplify right side
    239.12x = 82,568.53
  5. Step 5: Solve for x
    x = 82,568.53/239.12
  6. Step 6: Final answer
    x = 345.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.