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Finding the Third Proportional to 172.22 and 216.05

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Solution

The third proportional to 172.22 and 216.05 is: 271.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.22 : 216.05 = 216.05 : x
  2. Step 2: Convert to fraction form
    172.22/216.05 = 216.05/x
  3. Step 3: Cross multiply
    172.22x = 216.05 × 216.05
  4. Step 4: Simplify right side
    172.22x = 46,676.25
  5. Step 5: Solve for x
    x = 46,676.25/172.22
  6. Step 6: Final answer
    x = 271.03

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Why These Related Problems?

These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.