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Finding the Third Proportional to 641,832 and 1,390,689

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Solution

The third proportional to 641,832 and 1,390,689 is: 3,013,274.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,832 : 1,390,689 = 1,390,689 : x
  2. Step 2: Convert to fraction form
    641,832/1,390,689 = 1,390,689/x
  3. Step 3: Cross multiply
    641,832x = 1,390,689 × 1,390,689
  4. Step 4: Simplify right side
    641,832x = 1,934,015,894,721
  5. Step 5: Solve for x
    x = 1,934,015,894,721/641,832
  6. Step 6: Final answer
    x = 3,013,274.34

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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.