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Finding the Fourth Proportional to 342.20, 472.25 and 194.83

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Solution

The fourth proportional to 342.20, 472.25 and 194.83 is: 268.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.20 : 472.25 = 194.83 : x
  2. Step 2: Convert to fraction form
    342.20/472.25 = 194.83/x
  3. Step 3: Cross multiply
    342.20x = 472.25 × 194.83
  4. Step 4: Simplify right side
    342.20x = 92,010.43
  5. Step 5: Solve for x
    x = 92,010.43/342.20
  6. Step 6: Final answer
    x = 268.88

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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.