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Finding the Fourth Proportional to 187.11, 279.45 and 166.76

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Solution

The fourth proportional to 187.11, 279.45 and 166.76 is: 249.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.11 : 279.45 = 166.76 : x
  2. Step 2: Convert to fraction form
    187.11/279.45 = 166.76/x
  3. Step 3: Cross multiply
    187.11x = 279.45 × 166.76
  4. Step 4: Simplify right side
    187.11x = 46,600.73
  5. Step 5: Solve for x
    x = 46,600.73/187.11
  6. Step 6: Final answer
    x = 249.06

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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.