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Finding the Fourth Proportional to 512.12, 768.18 and 330.48

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Solution

The fourth proportional to 512.12, 768.18 and 330.48 is: 495.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.12 : 768.18 = 330.48 : x
  2. Step 2: Convert to fraction form
    512.12/768.18 = 330.48/x
  3. Step 3: Cross multiply
    512.12x = 768.18 × 330.48
  4. Step 4: Simplify right side
    512.12x = 253,869.37
  5. Step 5: Solve for x
    x = 253,869.37/512.12
  6. Step 6: Final answer
    x = 495.72

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Double scale
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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.