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Finding the Third Proportional to 821 and 1,923

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Solution

The third proportional to 821 and 1,923 is: 4,504.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    821 : 1,923 = 1,923 : x
  2. Step 2: Convert to fraction form
    821/1,923 = 1,923/x
  3. Step 3: Cross multiply
    821x = 1,923 × 1,923
  4. Step 4: Simplify right side
    821x = 3,697,929
  5. Step 5: Solve for x
    x = 3,697,929/821
  6. Step 6: Final answer
    x = 4,504.18

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.