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Finding the Fourth Proportional to 197.74, 272.87 and 109.22

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Solution

The fourth proportional to 197.74, 272.87 and 109.22 is: 150.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.74 : 272.87 = 109.22 : x
  2. Step 2: Convert to fraction form
    197.74/272.87 = 109.22/x
  3. Step 3: Cross multiply
    197.74x = 272.87 × 109.22
  4. Step 4: Simplify right side
    197.74x = 29,801.36
  5. Step 5: Solve for x
    x = 29,801.36/197.74
  6. Step 6: Final answer
    x = 150.71

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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.