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Finding the Fourth Proportional to 251.96, 379.28 and 194.49

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Solution

The fourth proportional to 251.96, 379.28 and 194.49 is: 292.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.96 : 379.28 = 194.49 : x
  2. Step 2: Convert to fraction form
    251.96/379.28 = 194.49/x
  3. Step 3: Cross multiply
    251.96x = 379.28 × 194.49
  4. Step 4: Simplify right side
    251.96x = 73,766.65
  5. Step 5: Solve for x
    x = 73,766.65/251.96
  6. Step 6: Final answer
    x = 292.78

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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.