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Finding the Third Proportional to 643,874 and 1,398,557

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Solution

The third proportional to 643,874 and 1,398,557 is: 3,037,801.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,874 : 1,398,557 = 1,398,557 : x
  2. Step 2: Convert to fraction form
    643,874/1,398,557 = 1,398,557/x
  3. Step 3: Cross multiply
    643,874x = 1,398,557 × 1,398,557
  4. Step 4: Simplify right side
    643,874x = 1,955,961,682,249
  5. Step 5: Solve for x
    x = 1,955,961,682,249/643,874
  6. Step 6: Final answer
    x = 3,037,801.93

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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.