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Finding the Third Proportional to 4,990,988 and 10,217,989

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Solution

The third proportional to 4,990,988 and 10,217,989 is: 20,919,164.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990,988 : 10,217,989 = 10,217,989 : x
  2. Step 2: Convert to fraction form
    4,990,988/10,217,989 = 10,217,989/x
  3. Step 3: Cross multiply
    4,990,988x = 10,217,989 × 10,217,989
  4. Step 4: Simplify right side
    4,990,988x = 104,407,299,204,121
  5. Step 5: Solve for x
    x = 104,407,299,204,121/4,990,988
  6. Step 6: Final answer
    x = 20,919,164.54

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.