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Finding the Third Proportional to 769.92 and 1,577.81

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Solution

The third proportional to 769.92 and 1,577.81 is: 3,233.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.92 : 1,577.81 = 1,577.81 : x
  2. Step 2: Convert to fraction form
    769.92/1,577.81 = 1,577.81/x
  3. Step 3: Cross multiply
    769.92x = 1,577.81 × 1,577.81
  4. Step 4: Simplify right side
    769.92x = 2,489,492.29
  5. Step 5: Solve for x
    x = 2,489,492.29/769.92
  6. Step 6: Final answer
    x = 3,233.43

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.