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Finding the Fourth Proportional to 197.11, 271.78 and 134.83

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Solution

The fourth proportional to 197.11, 271.78 and 134.83 is: 185.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.11 : 271.78 = 134.83 : x
  2. Step 2: Convert to fraction form
    197.11/271.78 = 134.83/x
  3. Step 3: Cross multiply
    197.11x = 271.78 × 134.83
  4. Step 4: Simplify right side
    197.11x = 36,644.10
  5. Step 5: Solve for x
    x = 36,644.10/197.11
  6. Step 6: Final answer
    x = 185.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.