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Finding the Fourth Proportional to 221.56, 331.76 and 153.23

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Solution

The fourth proportional to 221.56, 331.76 and 153.23 is: 229.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.56 : 331.76 = 153.23 : x
  2. Step 2: Convert to fraction form
    221.56/331.76 = 153.23/x
  3. Step 3: Cross multiply
    221.56x = 331.76 × 153.23
  4. Step 4: Simplify right side
    221.56x = 50,834.31
  5. Step 5: Solve for x
    x = 50,834.31/221.56
  6. Step 6: Final answer
    x = 229.44

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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.