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Finding the Third Proportional to 172.75 and 383.38

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Solution

The third proportional to 172.75 and 383.38 is: 850.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.75 : 383.38 = 383.38 : x
  2. Step 2: Convert to fraction form
    172.75/383.38 = 383.38/x
  3. Step 3: Cross multiply
    172.75x = 383.38 × 383.38
  4. Step 4: Simplify right side
    172.75x = 146,976.39
  5. Step 5: Solve for x
    x = 146,976.39/172.75
  6. Step 6: Final answer
    x = 850.80

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.