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Finding the Third Proportional to 180,100 and 391,912

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Solution

The third proportional to 180,100 and 391,912 is: 852,831.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,100 : 391,912 = 391,912 : x
  2. Step 2: Convert to fraction form
    180,100/391,912 = 391,912/x
  3. Step 3: Cross multiply
    180,100x = 391,912 × 391,912
  4. Step 4: Simplify right side
    180,100x = 153,595,015,744
  5. Step 5: Solve for x
    x = 153,595,015,744/180,100
  6. Step 6: Final answer
    x = 852,831.85

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.