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Finding the Fourth Proportional to 229.91, 345.11 and 171.55

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Solution

The fourth proportional to 229.91, 345.11 and 171.55 is: 257.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.91 : 345.11 = 171.55 : x
  2. Step 2: Convert to fraction form
    229.91/345.11 = 171.55/x
  3. Step 3: Cross multiply
    229.91x = 345.11 × 171.55
  4. Step 4: Simplify right side
    229.91x = 59,201.90
  5. Step 5: Solve for x
    x = 59,201.90/229.91
  6. Step 6: Final answer
    x = 257.51

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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.