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Finding the Fourth Proportional to 394.09, 590.90 and 229.76

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Solution

The fourth proportional to 394.09, 590.90 and 229.76 is: 344.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.09 : 590.90 = 229.76 : x
  2. Step 2: Convert to fraction form
    394.09/590.90 = 229.76/x
  3. Step 3: Cross multiply
    394.09x = 590.90 × 229.76
  4. Step 4: Simplify right side
    394.09x = 135,767.24
  5. Step 5: Solve for x
    x = 135,767.24/394.09
  6. Step 6: Final answer
    x = 344.51

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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.