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Finding the Fourth Proportional to 226.80, 338.04 and 215.24

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Solution

The fourth proportional to 226.80, 338.04 and 215.24 is: 320.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.80 : 338.04 = 215.24 : x
  2. Step 2: Convert to fraction form
    226.80/338.04 = 215.24/x
  3. Step 3: Cross multiply
    226.80x = 338.04 × 215.24
  4. Step 4: Simplify right side
    226.80x = 72,758.04
  5. Step 5: Solve for x
    x = 72,758.04/226.80
  6. Step 6: Final answer
    x = 320.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.