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Finding the Third Proportional to 1,292.63 and 2,661.19

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Solution

The third proportional to 1,292.63 and 2,661.19 is: 5,478.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.63 : 2,661.19 = 2,661.19 : x
  2. Step 2: Convert to fraction form
    1,292.63/2,661.19 = 2,661.19/x
  3. Step 3: Cross multiply
    1,292.63x = 2,661.19 × 2,661.19
  4. Step 4: Simplify right side
    1,292.63x = 7,081,918.91
  5. Step 5: Solve for x
    x = 7,081,918.91/1,292.63
  6. Step 6: Final answer
    x = 5,478.71

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.