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Finding the Fourth Proportional to 367.98, 550.56 and 221.19

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Solution

The fourth proportional to 367.98, 550.56 and 221.19 is: 330.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.98 : 550.56 = 221.19 : x
  2. Step 2: Convert to fraction form
    367.98/550.56 = 221.19/x
  3. Step 3: Cross multiply
    367.98x = 550.56 × 221.19
  4. Step 4: Simplify right side
    367.98x = 121,778.37
  5. Step 5: Solve for x
    x = 121,778.37/367.98
  6. Step 6: Final answer
    x = 330.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.