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Finding the Fourth Proportional to 229.61, 344.21 and 113.98

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Solution

The fourth proportional to 229.61, 344.21 and 113.98 is: 170.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.61 : 344.21 = 113.98 : x
  2. Step 2: Convert to fraction form
    229.61/344.21 = 113.98/x
  3. Step 3: Cross multiply
    229.61x = 344.21 × 113.98
  4. Step 4: Simplify right side
    229.61x = 39,233.06
  5. Step 5: Solve for x
    x = 39,233.06/229.61
  6. Step 6: Final answer
    x = 170.87

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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.