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Finding the Fourth Proportional to 379.16, 523.21 and 213.36

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Solution

The fourth proportional to 379.16, 523.21 and 213.36 is: 294.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.16 : 523.21 = 213.36 : x
  2. Step 2: Convert to fraction form
    379.16/523.21 = 213.36/x
  3. Step 3: Cross multiply
    379.16x = 523.21 × 213.36
  4. Step 4: Simplify right side
    379.16x = 111,631.46
  5. Step 5: Solve for x
    x = 111,631.46/379.16
  6. Step 6: Final answer
    x = 294.42

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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.