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Finding the Fourth Proportional to 512.62, 768.45 and 204.70

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Solution

The fourth proportional to 512.62, 768.45 and 204.70 is: 306.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.62 : 768.45 = 204.70 : x
  2. Step 2: Convert to fraction form
    512.62/768.45 = 204.70/x
  3. Step 3: Cross multiply
    512.62x = 768.45 × 204.70
  4. Step 4: Simplify right side
    512.62x = 157,301.72
  5. Step 5: Solve for x
    x = 157,301.72/512.62
  6. Step 6: Final answer
    x = 306.86

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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.