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Finding the Third Proportional to 1,640.81 and 3,453.75

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Solution

The third proportional to 1,640.81 and 3,453.75 is: 7,269.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.81 : 3,453.75 = 3,453.75 : x
  2. Step 2: Convert to fraction form
    1,640.81/3,453.75 = 3,453.75/x
  3. Step 3: Cross multiply
    1,640.81x = 3,453.75 × 3,453.75
  4. Step 4: Simplify right side
    1,640.81x = 11,928,389.06
  5. Step 5: Solve for x
    x = 11,928,389.06/1,640.81
  6. Step 6: Final answer
    x = 7,269.81

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.