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Finding the Fourth Proportional to 221.37, 331.26 and 163.46

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Solution

The fourth proportional to 221.37, 331.26 and 163.46 is: 244.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.37 : 331.26 = 163.46 : x
  2. Step 2: Convert to fraction form
    221.37/331.26 = 163.46/x
  3. Step 3: Cross multiply
    221.37x = 331.26 × 163.46
  4. Step 4: Simplify right side
    221.37x = 54,146.10
  5. Step 5: Solve for x
    x = 54,146.10/221.37
  6. Step 6: Final answer
    x = 244.60

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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.