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Finding the Third Proportional to 297,728 and 642,100

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Solution

The third proportional to 297,728 and 642,100 is: 1,384,795.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,728 : 642,100 = 642,100 : x
  2. Step 2: Convert to fraction form
    297,728/642,100 = 642,100/x
  3. Step 3: Cross multiply
    297,728x = 642,100 × 642,100
  4. Step 4: Simplify right side
    297,728x = 412,292,410,000
  5. Step 5: Solve for x
    x = 412,292,410,000/297,728
  6. Step 6: Final answer
    x = 1,384,795.55

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.