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Finding the Fourth Proportional to 512.55, 768.24 and 252.63

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Solution

The fourth proportional to 512.55, 768.24 and 252.63 is: 378.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.55 : 768.24 = 252.63 : x
  2. Step 2: Convert to fraction form
    512.55/768.24 = 252.63/x
  3. Step 3: Cross multiply
    512.55x = 768.24 × 252.63
  4. Step 4: Simplify right side
    512.55x = 194,080.47
  5. Step 5: Solve for x
    x = 194,080.47/512.55
  6. Step 6: Final answer
    x = 378.66

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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.