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Finding the Fourth Proportional to 512.37, 768.69 and 219.93

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Solution

The fourth proportional to 512.37, 768.69 and 219.93 is: 329.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.37 : 768.69 = 219.93 : x
  2. Step 2: Convert to fraction form
    512.37/768.69 = 219.93/x
  3. Step 3: Cross multiply
    512.37x = 768.69 × 219.93
  4. Step 4: Simplify right side
    512.37x = 169,057.99
  5. Step 5: Solve for x
    x = 169,057.99/512.37
  6. Step 6: Final answer
    x = 329.95

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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.