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Finding the Fourth Proportional to 185.18, 277.84 and 76.96

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Solution

The fourth proportional to 185.18, 277.84 and 76.96 is: 115.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.18 : 277.84 = 76.96 : x
  2. Step 2: Convert to fraction form
    185.18/277.84 = 76.96/x
  3. Step 3: Cross multiply
    185.18x = 277.84 × 76.96
  4. Step 4: Simplify right side
    185.18x = 21,382.57
  5. Step 5: Solve for x
    x = 21,382.57/185.18
  6. Step 6: Final answer
    x = 115.47

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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.