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Finding the Fourth Proportional to 166.97, 248.98 and 155.42

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Solution

The fourth proportional to 166.97, 248.98 and 155.42 is: 231.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.97 : 248.98 = 155.42 : x
  2. Step 2: Convert to fraction form
    166.97/248.98 = 155.42/x
  3. Step 3: Cross multiply
    166.97x = 248.98 × 155.42
  4. Step 4: Simplify right side
    166.97x = 38,696.47
  5. Step 5: Solve for x
    x = 38,696.47/166.97
  6. Step 6: Final answer
    x = 231.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.