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Finding the Third Proportional to 394,490 and 862,636

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Solution

The third proportional to 394,490 and 862,636 is: 1,886,336.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,490 : 862,636 = 862,636 : x
  2. Step 2: Convert to fraction form
    394,490/862,636 = 862,636/x
  3. Step 3: Cross multiply
    394,490x = 862,636 × 862,636
  4. Step 4: Simplify right side
    394,490x = 744,140,868,496
  5. Step 5: Solve for x
    x = 744,140,868,496/394,490
  6. Step 6: Final answer
    x = 1,886,336.46

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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.