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Finding the Fourth Proportional to 512.43, 768.87 and 204.51

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Solution

The fourth proportional to 512.43, 768.87 and 204.51 is: 306.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.43 : 768.87 = 204.51 : x
  2. Step 2: Convert to fraction form
    512.43/768.87 = 204.51/x
  3. Step 3: Cross multiply
    512.43x = 768.87 × 204.51
  4. Step 4: Simplify right side
    512.43x = 157,239.59
  5. Step 5: Solve for x
    x = 157,239.59/512.43
  6. Step 6: Final answer
    x = 306.85

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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.