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Finding the Third Proportional to 393,840 and 863,922

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Solution

The third proportional to 393,840 and 863,922 is: 1,895,087.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,840 : 863,922 = 863,922 : x
  2. Step 2: Convert to fraction form
    393,840/863,922 = 863,922/x
  3. Step 3: Cross multiply
    393,840x = 863,922 × 863,922
  4. Step 4: Simplify right side
    393,840x = 746,361,222,084
  5. Step 5: Solve for x
    x = 746,361,222,084/393,840
  6. Step 6: Final answer
    x = 1,895,087.40

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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.