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Finding the Fourth Proportional to 519.92, 779.79 and 231.29

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Solution

The fourth proportional to 519.92, 779.79 and 231.29 is: 346.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.92 : 779.79 = 231.29 : x
  2. Step 2: Convert to fraction form
    519.92/779.79 = 231.29/x
  3. Step 3: Cross multiply
    519.92x = 779.79 × 231.29
  4. Step 4: Simplify right side
    519.92x = 180,353.73
  5. Step 5: Solve for x
    x = 180,353.73/519.92
  6. Step 6: Final answer
    x = 346.89

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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.