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Finding the Third Proportional to 165.80 and 361.55

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Solution

The third proportional to 165.80 and 361.55 is: 788.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.80 : 361.55 = 361.55 : x
  2. Step 2: Convert to fraction form
    165.80/361.55 = 361.55/x
  3. Step 3: Cross multiply
    165.80x = 361.55 × 361.55
  4. Step 4: Simplify right side
    165.80x = 130,716.14
  5. Step 5: Solve for x
    x = 130,716.14/165.80
  6. Step 6: Final answer
    x = 788.41

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.