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Finding the Fourth Proportional to 408.88, 612.60 and 254.44

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Solution

The fourth proportional to 408.88, 612.60 and 254.44 is: 381.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.88 : 612.60 = 254.44 : x
  2. Step 2: Convert to fraction form
    408.88/612.60 = 254.44/x
  3. Step 3: Cross multiply
    408.88x = 612.60 × 254.44
  4. Step 4: Simplify right side
    408.88x = 155,869.94
  5. Step 5: Solve for x
    x = 155,869.94/408.88
  6. Step 6: Final answer
    x = 381.21

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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.