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Finding the Fourth Proportional to 226.80, 313.04 and 138.29

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Solution

The fourth proportional to 226.80, 313.04 and 138.29 is: 190.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.80 : 313.04 = 138.29 : x
  2. Step 2: Convert to fraction form
    226.80/313.04 = 138.29/x
  3. Step 3: Cross multiply
    226.80x = 313.04 × 138.29
  4. Step 4: Simplify right side
    226.80x = 43,290.30
  5. Step 5: Solve for x
    x = 43,290.30/226.80
  6. Step 6: Final answer
    x = 190.87

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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.