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Finding the Fourth Proportional to 512.32, 768.44 and 127.56

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Solution

The fourth proportional to 512.32, 768.44 and 127.56 is: 191.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.32 : 768.44 = 127.56 : x
  2. Step 2: Convert to fraction form
    512.32/768.44 = 127.56/x
  3. Step 3: Cross multiply
    512.32x = 768.44 × 127.56
  4. Step 4: Simplify right side
    512.32x = 98,022.21
  5. Step 5: Solve for x
    x = 98,022.21/512.32
  6. Step 6: Final answer
    x = 191.33

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Similar ratio
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1.5x scale

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.