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Finding the Fourth Proportional to 197.78, 296.53 and 75.97

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Solution

The fourth proportional to 197.78, 296.53 and 75.97 is: 113.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.78 : 296.53 = 75.97 : x
  2. Step 2: Convert to fraction form
    197.78/296.53 = 75.97/x
  3. Step 3: Cross multiply
    197.78x = 296.53 × 75.97
  4. Step 4: Simplify right side
    197.78x = 22,527.38
  5. Step 5: Solve for x
    x = 22,527.38/197.78
  6. Step 6: Final answer
    x = 113.90

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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.