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Finding the Third Proportional to 1,309.13 and 2,159.81

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Solution

The third proportional to 1,309.13 and 2,159.81 is: 3,563.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.13 : 2,159.81 = 2,159.81 : x
  2. Step 2: Convert to fraction form
    1,309.13/2,159.81 = 2,159.81/x
  3. Step 3: Cross multiply
    1,309.13x = 2,159.81 × 2,159.81
  4. Step 4: Simplify right side
    1,309.13x = 4,664,790.04
  5. Step 5: Solve for x
    x = 4,664,790.04/1,309.13
  6. Step 6: Final answer
    x = 3,563.29

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.