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Finding the Fourth Proportional to 197.32, 272.22 and 118.61

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Solution

The fourth proportional to 197.32, 272.22 and 118.61 is: 163.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.32 : 272.22 = 118.61 : x
  2. Step 2: Convert to fraction form
    197.32/272.22 = 118.61/x
  3. Step 3: Cross multiply
    197.32x = 272.22 × 118.61
  4. Step 4: Simplify right side
    197.32x = 32,287.72
  5. Step 5: Solve for x
    x = 32,287.72/197.32
  6. Step 6: Final answer
    x = 163.63

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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.