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Finding the Fourth Proportional to 296.22, 408.39 and 197.81

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Solution

The fourth proportional to 296.22, 408.39 and 197.81 is: 272.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.22 : 408.39 = 197.81 : x
  2. Step 2: Convert to fraction form
    296.22/408.39 = 197.81/x
  3. Step 3: Cross multiply
    296.22x = 408.39 × 197.81
  4. Step 4: Simplify right side
    296.22x = 80,781.58
  5. Step 5: Solve for x
    x = 80,781.58/296.22
  6. Step 6: Final answer
    x = 272.71

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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.