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Finding the Fourth Proportional to 394.20, 590.82 and 231.48

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Solution

The fourth proportional to 394.20, 590.82 and 231.48 is: 346.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.20 : 590.82 = 231.48 : x
  2. Step 2: Convert to fraction form
    394.20/590.82 = 231.48/x
  3. Step 3: Cross multiply
    394.20x = 590.82 × 231.48
  4. Step 4: Simplify right side
    394.20x = 136,763.01
  5. Step 5: Solve for x
    x = 136,763.01/394.20
  6. Step 6: Final answer
    x = 346.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.