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Finding the Fourth Proportional to 254.20, 350.75 and 143.65

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Solution

The fourth proportional to 254.20, 350.75 and 143.65 is: 198.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.20 : 350.75 = 143.65 : x
  2. Step 2: Convert to fraction form
    254.20/350.75 = 143.65/x
  3. Step 3: Cross multiply
    254.20x = 350.75 × 143.65
  4. Step 4: Simplify right side
    254.20x = 50,385.24
  5. Step 5: Solve for x
    x = 50,385.24/254.20
  6. Step 6: Final answer
    x = 198.21

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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.