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Finding the Fourth Proportional to 512.80, 769.04 and 204.60

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Solution

The fourth proportional to 512.80, 769.04 and 204.60 is: 306.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.80 : 769.04 = 204.60 : x
  2. Step 2: Convert to fraction form
    512.80/769.04 = 204.60/x
  3. Step 3: Cross multiply
    512.80x = 769.04 × 204.60
  4. Step 4: Simplify right side
    512.80x = 157,345.58
  5. Step 5: Solve for x
    x = 157,345.58/512.80
  6. Step 6: Final answer
    x = 306.84

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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.