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Finding the Fourth Proportional to 378.20, 522.14 and 254.27

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Solution

The fourth proportional to 378.20, 522.14 and 254.27 is: 351.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.20 : 522.14 = 254.27 : x
  2. Step 2: Convert to fraction form
    378.20/522.14 = 254.27/x
  3. Step 3: Cross multiply
    378.20x = 522.14 × 254.27
  4. Step 4: Simplify right side
    378.20x = 132,760.66
  5. Step 5: Solve for x
    x = 132,760.66/378.20
  6. Step 6: Final answer
    x = 351.04

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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.