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Finding the Third Proportional to 2,922 and 7,777

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Solution

The third proportional to 2,922 and 7,777 is: 20,698.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,922 : 7,777 = 7,777 : x
  2. Step 2: Convert to fraction form
    2,922/7,777 = 7,777/x
  3. Step 3: Cross multiply
    2,922x = 7,777 × 7,777
  4. Step 4: Simplify right side
    2,922x = 60,481,729
  5. Step 5: Solve for x
    x = 60,481,729/2,922
  6. Step 6: Final answer
    x = 20,698.74

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Why These Related Problems?

These problems maintain the same ratio (2.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.