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Finding the Third Proportional to 987 and 1,923

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Solution

The third proportional to 987 and 1,923 is: 3,746.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    987 : 1,923 = 1,923 : x
  2. Step 2: Convert to fraction form
    987/1,923 = 1,923/x
  3. Step 3: Cross multiply
    987x = 1,923 × 1,923
  4. Step 4: Simplify right side
    987x = 3,697,929
  5. Step 5: Solve for x
    x = 3,697,929/987
  6. Step 6: Final answer
    x = 3,746.64

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.