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Finding the Fourth Proportional to 512.26, 768.69 and 223.66

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Solution

The fourth proportional to 512.26, 768.69 and 223.66 is: 335.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.26 : 768.69 = 223.66 : x
  2. Step 2: Convert to fraction form
    512.26/768.69 = 223.66/x
  3. Step 3: Cross multiply
    512.26x = 768.69 × 223.66
  4. Step 4: Simplify right side
    512.26x = 171,920.24
  5. Step 5: Solve for x
    x = 171,920.24/512.26
  6. Step 6: Final answer
    x = 335.61

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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.