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Finding the Fourth Proportional to 417.87, 576.69 and 231.39

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Solution

The fourth proportional to 417.87, 576.69 and 231.39 is: 319.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.87 : 576.69 = 231.39 : x
  2. Step 2: Convert to fraction form
    417.87/576.69 = 231.39/x
  3. Step 3: Cross multiply
    417.87x = 576.69 × 231.39
  4. Step 4: Simplify right side
    417.87x = 133,440.30
  5. Step 5: Solve for x
    x = 133,440.30/417.87
  6. Step 6: Final answer
    x = 319.33

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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.