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Finding the Fourth Proportional to 418.05, 576.92 and 231.54

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Solution

The fourth proportional to 418.05, 576.92 and 231.54 is: 319.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.05 : 576.92 = 231.54 : x
  2. Step 2: Convert to fraction form
    418.05/576.92 = 231.54/x
  3. Step 3: Cross multiply
    418.05x = 576.92 × 231.54
  4. Step 4: Simplify right side
    418.05x = 133,579.97
  5. Step 5: Solve for x
    x = 133,579.97/418.05
  6. Step 6: Final answer
    x = 319.53

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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.