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Finding the Third Proportional to 687,240 and 1,421,622

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Solution

The third proportional to 687,240 and 1,421,622 is: 2,940,761.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,240 : 1,421,622 = 1,421,622 : x
  2. Step 2: Convert to fraction form
    687,240/1,421,622 = 1,421,622/x
  3. Step 3: Cross multiply
    687,240x = 1,421,622 × 1,421,622
  4. Step 4: Simplify right side
    687,240x = 2,021,009,110,884
  5. Step 5: Solve for x
    x = 2,021,009,110,884/687,240
  6. Step 6: Final answer
    x = 2,940,761.76

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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.