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Finding the Fourth Proportional to 251.97, 347.81 and 174.21

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Solution

The fourth proportional to 251.97, 347.81 and 174.21 is: 240.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.97 : 347.81 = 174.21 : x
  2. Step 2: Convert to fraction form
    251.97/347.81 = 174.21/x
  3. Step 3: Cross multiply
    251.97x = 347.81 × 174.21
  4. Step 4: Simplify right side
    251.97x = 60,591.11
  5. Step 5: Solve for x
    x = 60,591.11/251.97
  6. Step 6: Final answer
    x = 240.47

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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.