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Finding the Third Proportional to 221.50 and 449.75

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Solution

The third proportional to 221.50 and 449.75 is: 913.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.50 : 449.75 = 449.75 : x
  2. Step 2: Convert to fraction form
    221.50/449.75 = 449.75/x
  3. Step 3: Cross multiply
    221.50x = 449.75 × 449.75
  4. Step 4: Simplify right side
    221.50x = 202,275.06
  5. Step 5: Solve for x
    x = 202,275.06/221.50
  6. Step 6: Final answer
    x = 913.21

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.