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Finding the Third Proportional to 311,558 and 677,790

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Solution

The third proportional to 311,558 and 677,790 is: 1,474,522.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,558 : 677,790 = 677,790 : x
  2. Step 2: Convert to fraction form
    311,558/677,790 = 677,790/x
  3. Step 3: Cross multiply
    311,558x = 677,790 × 677,790
  4. Step 4: Simplify right side
    311,558x = 459,399,284,100
  5. Step 5: Solve for x
    x = 459,399,284,100/311,558
  6. Step 6: Final answer
    x = 1,474,522.51

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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.