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Finding the Fourth Proportional to 379.15, 523.20 and 213.36

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Solution

The fourth proportional to 379.15, 523.20 and 213.36 is: 294.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.15 : 523.20 = 213.36 : x
  2. Step 2: Convert to fraction form
    379.15/523.20 = 213.36/x
  3. Step 3: Cross multiply
    379.15x = 523.20 × 213.36
  4. Step 4: Simplify right side
    379.15x = 111,632.71
  5. Step 5: Solve for x
    x = 111,632.71/379.15
  6. Step 6: Final answer
    x = 294.43

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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.