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Finding the Fourth Proportional to 512.45, 768.67 and 147.23

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Solution

The fourth proportional to 512.45, 768.67 and 147.23 is: 220.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.45 : 768.67 = 147.23 : x
  2. Step 2: Convert to fraction form
    512.45/768.67 = 147.23/x
  3. Step 3: Cross multiply
    512.45x = 768.67 × 147.23
  4. Step 4: Simplify right side
    512.45x = 113,171.28
  5. Step 5: Solve for x
    x = 113,171.28/512.45
  6. Step 6: Final answer
    x = 220.85

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Similar ratio
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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.