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Finding the Fourth Proportional to 512.58, 768.29 and 219.94

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Solution

The fourth proportional to 512.58, 768.29 and 219.94 is: 329.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.58 : 768.29 = 219.94 : x
  2. Step 2: Convert to fraction form
    512.58/768.29 = 219.94/x
  3. Step 3: Cross multiply
    512.58x = 768.29 × 219.94
  4. Step 4: Simplify right side
    512.58x = 168,977.70
  5. Step 5: Solve for x
    x = 168,977.70/512.58
  6. Step 6: Final answer
    x = 329.66

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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.