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Finding the Fourth Proportional to 512.72, 768.86 and 165.94

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Solution

The fourth proportional to 512.72, 768.86 and 165.94 is: 248.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.72 : 768.86 = 165.94 : x
  2. Step 2: Convert to fraction form
    512.72/768.86 = 165.94/x
  3. Step 3: Cross multiply
    512.72x = 768.86 × 165.94
  4. Step 4: Simplify right side
    512.72x = 127,584.63
  5. Step 5: Solve for x
    x = 127,584.63/512.72
  6. Step 6: Final answer
    x = 248.84

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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.