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Finding the Third Proportional to 2,129.63 and 3,305.81

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Solution

The third proportional to 2,129.63 and 3,305.81 is: 5,131.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.63 : 3,305.81 = 3,305.81 : x
  2. Step 2: Convert to fraction form
    2,129.63/3,305.81 = 3,305.81/x
  3. Step 3: Cross multiply
    2,129.63x = 3,305.81 × 3,305.81
  4. Step 4: Simplify right side
    2,129.63x = 10,928,396.29
  5. Step 5: Solve for x
    x = 10,928,396.29/2,129.63
  6. Step 6: Final answer
    x = 5,131.61

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.