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Finding the Third Proportional to 172 and 401.50

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Solution

The third proportional to 172 and 401.50 is: 937.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172 : 401.50 = 401.50 : x
  2. Step 2: Convert to fraction form
    172/401.50 = 401.50/x
  3. Step 3: Cross multiply
    172x = 401.50 × 401.50
  4. Step 4: Simplify right side
    172x = 161,202.25
  5. Step 5: Solve for x
    x = 161,202.25/172
  6. Step 6: Final answer
    x = 937.22

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Why These Related Problems?

These problems maintain the same ratio (2.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.