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Finding the Third Proportional to 687,622 and 1,485,855

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Solution

The third proportional to 687,622 and 1,485,855 is: 3,210,724.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,622 : 1,485,855 = 1,485,855 : x
  2. Step 2: Convert to fraction form
    687,622/1,485,855 = 1,485,855/x
  3. Step 3: Cross multiply
    687,622x = 1,485,855 × 1,485,855
  4. Step 4: Simplify right side
    687,622x = 2,207,765,081,025
  5. Step 5: Solve for x
    x = 2,207,765,081,025/687,622
  6. Step 6: Final answer
    x = 3,210,724.91

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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.