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Finding the Third Proportional to 984,990 and 2,120,640

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Solution

The third proportional to 984,990 and 2,120,640 is: 4,565,644.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    984,990 : 2,120,640 = 2,120,640 : x
  2. Step 2: Convert to fraction form
    984,990/2,120,640 = 2,120,640/x
  3. Step 3: Cross multiply
    984,990x = 2,120,640 × 2,120,640
  4. Step 4: Simplify right side
    984,990x = 4,497,114,009,600
  5. Step 5: Solve for x
    x = 4,497,114,009,600/984,990
  6. Step 6: Final answer
    x = 4,565,644.33

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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.