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Finding the Third Proportional to 643,010 and 1,396,720

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Solution

The third proportional to 643,010 and 1,396,720 is: 3,033,898.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,010 : 1,396,720 = 1,396,720 : x
  2. Step 2: Convert to fraction form
    643,010/1,396,720 = 1,396,720/x
  3. Step 3: Cross multiply
    643,010x = 1,396,720 × 1,396,720
  4. Step 4: Simplify right side
    643,010x = 1,950,826,758,400
  5. Step 5: Solve for x
    x = 1,950,826,758,400/643,010
  6. Step 6: Final answer
    x = 3,033,898.01

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.