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Finding the Fourth Proportional to 379.92, 523.80 and 248.88

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Solution

The fourth proportional to 379.92, 523.80 and 248.88 is: 343.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.92 : 523.80 = 248.88 : x
  2. Step 2: Convert to fraction form
    379.92/523.80 = 248.88/x
  3. Step 3: Cross multiply
    379.92x = 523.80 × 248.88
  4. Step 4: Simplify right side
    379.92x = 130,363.34
  5. Step 5: Solve for x
    x = 130,363.34/379.92
  6. Step 6: Final answer
    x = 343.13

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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.