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Finding the Third Proportional to 765 and 1,619.44

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Solution

The third proportional to 765 and 1,619.44 is: 3,428.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    765 : 1,619.44 = 1,619.44 : x
  2. Step 2: Convert to fraction form
    765/1,619.44 = 1,619.44/x
  3. Step 3: Cross multiply
    765x = 1,619.44 × 1,619.44
  4. Step 4: Simplify right side
    765x = 2,622,577.82
  5. Step 5: Solve for x
    x = 2,622,577.82/765
  6. Step 6: Final answer
    x = 3,428.21

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.