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Finding the Fourth Proportional to 251.17, 345.45 and 201.97

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Solution

The fourth proportional to 251.17, 345.45 and 201.97 is: 277.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.17 : 345.45 = 201.97 : x
  2. Step 2: Convert to fraction form
    251.17/345.45 = 201.97/x
  3. Step 3: Cross multiply
    251.17x = 345.45 × 201.97
  4. Step 4: Simplify right side
    251.17x = 69,770.54
  5. Step 5: Solve for x
    x = 69,770.54/251.17
  6. Step 6: Final answer
    x = 277.78

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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.