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Finding the Fourth Proportional to 229.41, 343.91 and 92.43

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Solution

The fourth proportional to 229.41, 343.91 and 92.43 is: 138.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.41 : 343.91 = 92.43 : x
  2. Step 2: Convert to fraction form
    229.41/343.91 = 92.43/x
  3. Step 3: Cross multiply
    229.41x = 343.91 × 92.43
  4. Step 4: Simplify right side
    229.41x = 31,787.14
  5. Step 5: Solve for x
    x = 31,787.14/229.41
  6. Step 6: Final answer
    x = 138.56

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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.