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Finding the Fourth Proportional to 197.76, 274.17 and 193.80

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Solution

The fourth proportional to 197.76, 274.17 and 193.80 is: 268.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.76 : 274.17 = 193.80 : x
  2. Step 2: Convert to fraction form
    197.76/274.17 = 193.80/x
  3. Step 3: Cross multiply
    197.76x = 274.17 × 193.80
  4. Step 4: Simplify right side
    197.76x = 53,134.15
  5. Step 5: Solve for x
    x = 53,134.15/197.76
  6. Step 6: Final answer
    x = 268.68

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.