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Finding the Fourth Proportional to 197.67, 272.87 and 135.48

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Solution

The fourth proportional to 197.67, 272.87 and 135.48 is: 187.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.67 : 272.87 = 135.48 : x
  2. Step 2: Convert to fraction form
    197.67/272.87 = 135.48/x
  3. Step 3: Cross multiply
    197.67x = 272.87 × 135.48
  4. Step 4: Simplify right side
    197.67x = 36,968.43
  5. Step 5: Solve for x
    x = 36,968.43/197.67
  6. Step 6: Final answer
    x = 187.02

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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.