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Finding the Fourth Proportional to 226.80, 312.95 and 143.90

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Solution

The fourth proportional to 226.80, 312.95 and 143.90 is: 198.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.80 : 312.95 = 143.90 : x
  2. Step 2: Convert to fraction form
    226.80/312.95 = 143.90/x
  3. Step 3: Cross multiply
    226.80x = 312.95 × 143.90
  4. Step 4: Simplify right side
    226.80x = 45,033.51
  5. Step 5: Solve for x
    x = 45,033.51/226.80
  6. Step 6: Final answer
    x = 198.56

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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.