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Finding the Fourth Proportional to 512.06, 768.15 and 338.72

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Solution

The fourth proportional to 512.06, 768.15 and 338.72 is: 508.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.06 : 768.15 = 338.72 : x
  2. Step 2: Convert to fraction form
    512.06/768.15 = 338.72/x
  3. Step 3: Cross multiply
    512.06x = 768.15 × 338.72
  4. Step 4: Simplify right side
    512.06x = 260,183.93
  5. Step 5: Solve for x
    x = 260,183.93/512.06
  6. Step 6: Final answer
    x = 508.12

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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.