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Finding the Third Proportional to 1,276.59 and 2,689.03

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Solution

The third proportional to 1,276.59 and 2,689.03 is: 5,664.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.59 : 2,689.03 = 2,689.03 : x
  2. Step 2: Convert to fraction form
    1,276.59/2,689.03 = 2,689.03/x
  3. Step 3: Cross multiply
    1,276.59x = 2,689.03 × 2,689.03
  4. Step 4: Simplify right side
    1,276.59x = 7,230,889.06
  5. Step 5: Solve for x
    x = 7,230,889.06/1,276.59
  6. Step 6: Final answer
    x = 5,664.21

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.