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Finding the Third Proportional to 422,385 and 919,128

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Solution

The third proportional to 422,385 and 919,128 is: 2,000,062.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,385 : 919,128 = 919,128 : x
  2. Step 2: Convert to fraction form
    422,385/919,128 = 919,128/x
  3. Step 3: Cross multiply
    422,385x = 919,128 × 919,128
  4. Step 4: Simplify right side
    422,385x = 844,796,280,384
  5. Step 5: Solve for x
    x = 844,796,280,384/422,385
  6. Step 6: Final answer
    x = 2,000,062.22

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.