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Finding the Third Proportional to 398,100 and 874,920

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Solution

The third proportional to 398,100 and 874,920 is: 1,922,846.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,100 : 874,920 = 874,920 : x
  2. Step 2: Convert to fraction form
    398,100/874,920 = 874,920/x
  3. Step 3: Cross multiply
    398,100x = 874,920 × 874,920
  4. Step 4: Simplify right side
    398,100x = 765,485,006,400
  5. Step 5: Solve for x
    x = 765,485,006,400/398,100
  6. Step 6: Final answer
    x = 1,922,846.03

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.