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Finding the Fourth Proportional to 254.39, 351.05 and 143.85

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Solution

The fourth proportional to 254.39, 351.05 and 143.85 is: 198.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.39 : 351.05 = 143.85 : x
  2. Step 2: Convert to fraction form
    254.39/351.05 = 143.85/x
  3. Step 3: Cross multiply
    254.39x = 351.05 × 143.85
  4. Step 4: Simplify right side
    254.39x = 50,497.82
  5. Step 5: Solve for x
    x = 50,497.82/254.39
  6. Step 6: Final answer
    x = 198.50

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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.