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Finding the Fourth Proportional to 222.20, 332.90 and 163.78

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Solution

The fourth proportional to 222.20, 332.90 and 163.78 is: 245.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.20 : 332.90 = 163.78 : x
  2. Step 2: Convert to fraction form
    222.20/332.90 = 163.78/x
  3. Step 3: Cross multiply
    222.20x = 332.90 × 163.78
  4. Step 4: Simplify right side
    222.20x = 54,522.57
  5. Step 5: Solve for x
    x = 54,522.57/222.20
  6. Step 6: Final answer
    x = 245.37

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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.