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Finding the Fourth Proportional to 197.65, 271.78 and 191.58

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Solution

The fourth proportional to 197.65, 271.78 and 191.58 is: 263.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.65 : 271.78 = 191.58 : x
  2. Step 2: Convert to fraction form
    197.65/271.78 = 191.58/x
  3. Step 3: Cross multiply
    197.65x = 271.78 × 191.58
  4. Step 4: Simplify right side
    197.65x = 52,067.61
  5. Step 5: Solve for x
    x = 52,067.61/197.65
  6. Step 6: Final answer
    x = 263.43

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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.