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Finding the Third Proportional to 1,643.81 and 3,561.19

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Solution

The third proportional to 1,643.81 and 3,561.19 is: 7,715.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.81 : 3,561.19 = 3,561.19 : x
  2. Step 2: Convert to fraction form
    1,643.81/3,561.19 = 3,561.19/x
  3. Step 3: Cross multiply
    1,643.81x = 3,561.19 × 3,561.19
  4. Step 4: Simplify right side
    1,643.81x = 12,682,056.41
  5. Step 5: Solve for x
    x = 12,682,056.41/1,643.81
  6. Step 6: Final answer
    x = 7,715.03

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.