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Finding the Fourth Proportional to 198.72, 296.64 and 185.76

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Solution

The fourth proportional to 198.72, 296.64 and 185.76 is: 277.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.72 : 296.64 = 185.76 : x
  2. Step 2: Convert to fraction form
    198.72/296.64 = 185.76/x
  3. Step 3: Cross multiply
    198.72x = 296.64 × 185.76
  4. Step 4: Simplify right side
    198.72x = 55,103.85
  5. Step 5: Solve for x
    x = 55,103.85/198.72
  6. Step 6: Final answer
    x = 277.29

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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.