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Finding the Fourth Proportional to 379.41, 523.61 and 213.68

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Solution

The fourth proportional to 379.41, 523.61 and 213.68 is: 294.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.41 : 523.61 = 213.68 : x
  2. Step 2: Convert to fraction form
    379.41/523.61 = 213.68/x
  3. Step 3: Cross multiply
    379.41x = 523.61 × 213.68
  4. Step 4: Simplify right side
    379.41x = 111,881.30
  5. Step 5: Solve for x
    x = 111,881.30/379.41
  6. Step 6: Final answer
    x = 294.88

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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.