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Finding the Fourth Proportional to 251.80, 345.22 and 247.17

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Solution

The fourth proportional to 251.80, 345.22 and 247.17 is: 338.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.80 : 345.22 = 247.17 : x
  2. Step 2: Convert to fraction form
    251.80/345.22 = 247.17/x
  3. Step 3: Cross multiply
    251.80x = 345.22 × 247.17
  4. Step 4: Simplify right side
    251.80x = 85,328.03
  5. Step 5: Solve for x
    x = 85,328.03/251.80
  6. Step 6: Final answer
    x = 338.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.