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Finding the Fourth Proportional to 512.08, 768.12 and 255.76

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Solution

The fourth proportional to 512.08, 768.12 and 255.76 is: 383.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.08 : 768.12 = 255.76 : x
  2. Step 2: Convert to fraction form
    512.08/768.12 = 255.76/x
  3. Step 3: Cross multiply
    512.08x = 768.12 × 255.76
  4. Step 4: Simplify right side
    512.08x = 196,454.37
  5. Step 5: Solve for x
    x = 196,454.37/512.08
  6. Step 6: Final answer
    x = 383.64

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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.