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Finding the Fourth Proportional to 481.97, 665.21 and 378.29

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Solution

The fourth proportional to 481.97, 665.21 and 378.29 is: 522.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.97 : 665.21 = 378.29 : x
  2. Step 2: Convert to fraction form
    481.97/665.21 = 378.29/x
  3. Step 3: Cross multiply
    481.97x = 665.21 × 378.29
  4. Step 4: Simplify right side
    481.97x = 251,640.40
  5. Step 5: Solve for x
    x = 251,640.40/481.97
  6. Step 6: Final answer
    x = 522.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.