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Finding the Fourth Proportional to 251.26, 347.18 and 218.46

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Solution

The fourth proportional to 251.26, 347.18 and 218.46 is: 301.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.26 : 347.18 = 218.46 : x
  2. Step 2: Convert to fraction form
    251.26/347.18 = 218.46/x
  3. Step 3: Cross multiply
    251.26x = 347.18 × 218.46
  4. Step 4: Simplify right side
    251.26x = 75,844.94
  5. Step 5: Solve for x
    x = 75,844.94/251.26
  6. Step 6: Final answer
    x = 301.86

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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.