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Finding the Fourth Proportional to 379.11, 523.12 and 213.30

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Solution

The fourth proportional to 379.11, 523.12 and 213.30 is: 294.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.11 : 523.12 = 213.30 : x
  2. Step 2: Convert to fraction form
    379.11/523.12 = 213.30/x
  3. Step 3: Cross multiply
    379.11x = 523.12 × 213.30
  4. Step 4: Simplify right side
    379.11x = 111,581.50
  5. Step 5: Solve for x
    x = 111,581.50/379.11
  6. Step 6: Final answer
    x = 294.32

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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.