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Finding the Fourth Proportional to 269.85, 372.45 and 171.55

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Solution

The fourth proportional to 269.85, 372.45 and 171.55 is: 236.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.85 : 372.45 = 171.55 : x
  2. Step 2: Convert to fraction form
    269.85/372.45 = 171.55/x
  3. Step 3: Cross multiply
    269.85x = 372.45 × 171.55
  4. Step 4: Simplify right side
    269.85x = 63,893.80
  5. Step 5: Solve for x
    x = 63,893.80/269.85
  6. Step 6: Final answer
    x = 236.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.