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Finding the Third Proportional to 990,401 and 2,170,663

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Solution

The third proportional to 990,401 and 2,170,663 is: 4,757,444.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,401 : 2,170,663 = 2,170,663 : x
  2. Step 2: Convert to fraction form
    990,401/2,170,663 = 2,170,663/x
  3. Step 3: Cross multiply
    990,401x = 2,170,663 × 2,170,663
  4. Step 4: Simplify right side
    990,401x = 4,711,777,859,569
  5. Step 5: Solve for x
    x = 4,711,777,859,569/990,401
  6. Step 6: Final answer
    x = 4,757,444.57

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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.