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Finding the Fourth Proportional to 512.48, 768.10 and 238.20

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Solution

The fourth proportional to 512.48, 768.10 and 238.20 is: 357.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.48 : 768.10 = 238.20 : x
  2. Step 2: Convert to fraction form
    512.48/768.10 = 238.20/x
  3. Step 3: Cross multiply
    512.48x = 768.10 × 238.20
  4. Step 4: Simplify right side
    512.48x = 182,961.42
  5. Step 5: Solve for x
    x = 182,961.42/512.48
  6. Step 6: Final answer
    x = 357.01

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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.