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Finding the Third Proportional to 981,639 and 2,140,668

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Solution

The third proportional to 981,639 and 2,140,668 is: 4,668,171.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,639 : 2,140,668 = 2,140,668 : x
  2. Step 2: Convert to fraction form
    981,639/2,140,668 = 2,140,668/x
  3. Step 3: Cross multiply
    981,639x = 2,140,668 × 2,140,668
  4. Step 4: Simplify right side
    981,639x = 4,582,459,486,224
  5. Step 5: Solve for x
    x = 4,582,459,486,224/981,639
  6. Step 6: Final answer
    x = 4,668,171.79

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.