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Finding the Fourth Proportional to 226.80, 312.87 and 143.77

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Solution

The fourth proportional to 226.80, 312.87 and 143.77 is: 198.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.80 : 312.87 = 143.77 : x
  2. Step 2: Convert to fraction form
    226.80/312.87 = 143.77/x
  3. Step 3: Cross multiply
    226.80x = 312.87 × 143.77
  4. Step 4: Simplify right side
    226.80x = 44,980.54
  5. Step 5: Solve for x
    x = 44,980.54/226.80
  6. Step 6: Final answer
    x = 198.33

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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.