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Finding the Third Proportional to 408,891 and 879,990

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Solution

The third proportional to 408,891 and 879,990 is: 1,893,860.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,891 : 879,990 = 879,990 : x
  2. Step 2: Convert to fraction form
    408,891/879,990 = 879,990/x
  3. Step 3: Cross multiply
    408,891x = 879,990 × 879,990
  4. Step 4: Simplify right side
    408,891x = 774,382,400,100
  5. Step 5: Solve for x
    x = 774,382,400,100/408,891
  6. Step 6: Final answer
    x = 1,893,860.22

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.