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Finding the Fourth Proportional to 226.88, 312.97 and 143.84

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Solution

The fourth proportional to 226.88, 312.97 and 143.84 is: 198.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.88 : 312.97 = 143.84 : x
  2. Step 2: Convert to fraction form
    226.88/312.97 = 143.84/x
  3. Step 3: Cross multiply
    226.88x = 312.97 × 143.84
  4. Step 4: Simplify right side
    226.88x = 45,017.60
  5. Step 5: Solve for x
    x = 45,017.60/226.88
  6. Step 6: Final answer
    x = 198.42

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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.