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Finding the Third Proportional to 2,106 and 3,129

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Solution

The third proportional to 2,106 and 3,129 is: 4,648.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106 : 3,129 = 3,129 : x
  2. Step 2: Convert to fraction form
    2,106/3,129 = 3,129/x
  3. Step 3: Cross multiply
    2,106x = 3,129 × 3,129
  4. Step 4: Simplify right side
    2,106x = 9,790,641
  5. Step 5: Solve for x
    x = 9,790,641/2,106
  6. Step 6: Final answer
    x = 4,648.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.