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Finding the Third Proportional to 1,821,998 and 3,987,220

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Solution

The third proportional to 1,821,998 and 3,987,220 is: 8,725,543.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821,998 : 3,987,220 = 3,987,220 : x
  2. Step 2: Convert to fraction form
    1,821,998/3,987,220 = 3,987,220/x
  3. Step 3: Cross multiply
    1,821,998x = 3,987,220 × 3,987,220
  4. Step 4: Simplify right side
    1,821,998x = 15,897,923,328,400
  5. Step 5: Solve for x
    x = 15,897,923,328,400/1,821,998
  6. Step 6: Final answer
    x = 8,725,543.79

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.