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Finding the Fourth Proportional to 441.20, 608.80 and 254.72

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Solution

The fourth proportional to 441.20, 608.80 and 254.72 is: 351.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.20 : 608.80 = 254.72 : x
  2. Step 2: Convert to fraction form
    441.20/608.80 = 254.72/x
  3. Step 3: Cross multiply
    441.20x = 608.80 × 254.72
  4. Step 4: Simplify right side
    441.20x = 155,073.54
  5. Step 5: Solve for x
    x = 155,073.54/441.20
  6. Step 6: Final answer
    x = 351.48

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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.