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Finding the Fourth Proportional to 512.30, 768.99 and 268.76

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Solution

The fourth proportional to 512.30, 768.99 and 268.76 is: 403.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.30 : 768.99 = 268.76 : x
  2. Step 2: Convert to fraction form
    512.30/768.99 = 268.76/x
  3. Step 3: Cross multiply
    512.30x = 768.99 × 268.76
  4. Step 4: Simplify right side
    512.30x = 206,673.75
  5. Step 5: Solve for x
    x = 206,673.75/512.30
  6. Step 6: Final answer
    x = 403.42

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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.