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Finding the Third Proportional to 1,878 and 3,906

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Solution

The third proportional to 1,878 and 3,906 is: 8,123.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878 : 3,906 = 3,906 : x
  2. Step 2: Convert to fraction form
    1,878/3,906 = 3,906/x
  3. Step 3: Cross multiply
    1,878x = 3,906 × 3,906
  4. Step 4: Simplify right side
    1,878x = 15,256,836
  5. Step 5: Solve for x
    x = 15,256,836/1,878
  6. Step 6: Final answer
    x = 8,123.98

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.