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Finding the Fourth Proportional to 222.20, 331.83 and 219.79

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Solution

The fourth proportional to 222.20, 331.83 and 219.79 is: 328.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.20 : 331.83 = 219.79 : x
  2. Step 2: Convert to fraction form
    222.20/331.83 = 219.79/x
  3. Step 3: Cross multiply
    222.20x = 331.83 × 219.79
  4. Step 4: Simplify right side
    222.20x = 72,932.72
  5. Step 5: Solve for x
    x = 72,932.72/222.20
  6. Step 6: Final answer
    x = 328.23

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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.