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Finding the Fourth Proportional to 269.78, 372.36 and 171.68

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Solution

The fourth proportional to 269.78, 372.36 and 171.68 is: 236.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.78 : 372.36 = 171.68 : x
  2. Step 2: Convert to fraction form
    269.78/372.36 = 171.68/x
  3. Step 3: Cross multiply
    269.78x = 372.36 × 171.68
  4. Step 4: Simplify right side
    269.78x = 63,926.76
  5. Step 5: Solve for x
    x = 63,926.76/269.78
  6. Step 6: Final answer
    x = 236.96

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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.