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Finding the Fourth Proportional to 251.28, 345.96 and 218.52

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Solution

The fourth proportional to 251.28, 345.96 and 218.52 is: 300.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.28 : 345.96 = 218.52 : x
  2. Step 2: Convert to fraction form
    251.28/345.96 = 218.52/x
  3. Step 3: Cross multiply
    251.28x = 345.96 × 218.52
  4. Step 4: Simplify right side
    251.28x = 75,599.18
  5. Step 5: Solve for x
    x = 75,599.18/251.28
  6. Step 6: Final answer
    x = 300.86

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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.