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Finding the Third Proportional to 638,690 and 888,039

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Solution

The third proportional to 638,690 and 888,039 is: 1,234,735.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,690 : 888,039 = 888,039 : x
  2. Step 2: Convert to fraction form
    638,690/888,039 = 888,039/x
  3. Step 3: Cross multiply
    638,690x = 888,039 × 888,039
  4. Step 4: Simplify right side
    638,690x = 788,613,265,521
  5. Step 5: Solve for x
    x = 788,613,265,521/638,690
  6. Step 6: Final answer
    x = 1,234,735.58

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.