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Finding the Third Proportional to 422,928 and 911,872

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Solution

The third proportional to 422,928 and 911,872 is: 1,966,080.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,928 : 911,872 = 911,872 : x
  2. Step 2: Convert to fraction form
    422,928/911,872 = 911,872/x
  3. Step 3: Cross multiply
    422,928x = 911,872 × 911,872
  4. Step 4: Simplify right side
    422,928x = 831,510,544,384
  5. Step 5: Solve for x
    x = 831,510,544,384/422,928
  6. Step 6: Final answer
    x = 1,966,080.62

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.