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Finding the Third Proportional to 687,247 and 1,421,636

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Solution

The third proportional to 687,247 and 1,421,636 is: 2,940,789.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,247 : 1,421,636 = 1,421,636 : x
  2. Step 2: Convert to fraction form
    687,247/1,421,636 = 1,421,636/x
  3. Step 3: Cross multiply
    687,247x = 1,421,636 × 1,421,636
  4. Step 4: Simplify right side
    687,247x = 2,021,048,916,496
  5. Step 5: Solve for x
    x = 2,021,048,916,496/687,247
  6. Step 6: Final answer
    x = 2,940,789.73

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.