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Finding the Fourth Proportional to 254.26, 350.90 and 143.78

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Solution

The fourth proportional to 254.26, 350.90 and 143.78 is: 198.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.26 : 350.90 = 143.78 : x
  2. Step 2: Convert to fraction form
    254.26/350.90 = 143.78/x
  3. Step 3: Cross multiply
    254.26x = 350.90 × 143.78
  4. Step 4: Simplify right side
    254.26x = 50,452.40
  5. Step 5: Solve for x
    x = 50,452.40/254.26
  6. Step 6: Final answer
    x = 198.43

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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.