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Finding the Fourth Proportional to 254.33, 350.93 and 143.78

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Solution

The fourth proportional to 254.33, 350.93 and 143.78 is: 198.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.33 : 350.93 = 143.78 : x
  2. Step 2: Convert to fraction form
    254.33/350.93 = 143.78/x
  3. Step 3: Cross multiply
    254.33x = 350.93 × 143.78
  4. Step 4: Simplify right side
    254.33x = 50,454.24
  5. Step 5: Solve for x
    x = 50,454.24/254.33
  6. Step 6: Final answer
    x = 198.38

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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.