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Finding the Fourth Proportional to 197.42, 296.11 and 81.83

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Solution

The fourth proportional to 197.42, 296.11 and 81.83 is: 122.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.42 : 296.11 = 81.83 : x
  2. Step 2: Convert to fraction form
    197.42/296.11 = 81.83/x
  3. Step 3: Cross multiply
    197.42x = 296.11 × 81.83
  4. Step 4: Simplify right side
    197.42x = 24,231.22
  5. Step 5: Solve for x
    x = 24,231.22/197.42
  6. Step 6: Final answer
    x = 122.74

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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.