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Finding the Fourth Proportional to 197.00, 271.92 and 138.89

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Solution

The fourth proportional to 197.00, 271.92 and 138.89 is: 191.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.00 : 271.92 = 138.89 : x
  2. Step 2: Convert to fraction form
    197.00/271.92 = 138.89/x
  3. Step 3: Cross multiply
    197.00x = 271.92 × 138.89
  4. Step 4: Simplify right side
    197.00x = 37,765.61
  5. Step 5: Solve for x
    x = 37,765.61/197.00
  6. Step 6: Final answer
    x = 191.71

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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.