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Finding the Third Proportional to 981,188 and 2,172,220

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Solution

The third proportional to 981,188 and 2,172,220 is: 4,809,006.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,188 : 2,172,220 = 2,172,220 : x
  2. Step 2: Convert to fraction form
    981,188/2,172,220 = 2,172,220/x
  3. Step 3: Cross multiply
    981,188x = 2,172,220 × 2,172,220
  4. Step 4: Simplify right side
    981,188x = 4,718,539,728,400
  5. Step 5: Solve for x
    x = 4,718,539,728,400/981,188
  6. Step 6: Final answer
    x = 4,809,006.76

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.