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Finding the Fourth Proportional to 187.81, 281.92 and 166.28

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Solution

The fourth proportional to 187.81, 281.92 and 166.28 is: 249.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.81 : 281.92 = 166.28 : x
  2. Step 2: Convert to fraction form
    187.81/281.92 = 166.28/x
  3. Step 3: Cross multiply
    187.81x = 281.92 × 166.28
  4. Step 4: Simplify right side
    187.81x = 46,876.12
  5. Step 5: Solve for x
    x = 46,876.12/187.81
  6. Step 6: Final answer
    x = 249.59

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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.