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Finding the Fourth Proportional to 251.73, 379.13 and 213.48

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Solution

The fourth proportional to 251.73, 379.13 and 213.48 is: 321.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.73 : 379.13 = 213.48 : x
  2. Step 2: Convert to fraction form
    251.73/379.13 = 213.48/x
  3. Step 3: Cross multiply
    251.73x = 379.13 × 213.48
  4. Step 4: Simplify right side
    251.73x = 80,935.61
  5. Step 5: Solve for x
    x = 80,935.61/251.73
  6. Step 6: Final answer
    x = 321.52

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.