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Finding the Fourth Proportional to 512.92, 769.38 and 137.68

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Solution

The fourth proportional to 512.92, 769.38 and 137.68 is: 206.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.92 : 769.38 = 137.68 : x
  2. Step 2: Convert to fraction form
    512.92/769.38 = 137.68/x
  3. Step 3: Cross multiply
    512.92x = 769.38 × 137.68
  4. Step 4: Simplify right side
    512.92x = 105,928.24
  5. Step 5: Solve for x
    x = 105,928.24/512.92
  6. Step 6: Final answer
    x = 206.52

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Double scale
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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.