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Finding the Third Proportional to 780.75 and 1,836.84

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Solution

The third proportional to 780.75 and 1,836.84 is: 4,321.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.75 : 1,836.84 = 1,836.84 : x
  2. Step 2: Convert to fraction form
    780.75/1,836.84 = 1,836.84/x
  3. Step 3: Cross multiply
    780.75x = 1,836.84 × 1,836.84
  4. Step 4: Simplify right side
    780.75x = 3,373,994.96
  5. Step 5: Solve for x
    x = 3,373,994.96/780.75
  6. Step 6: Final answer
    x = 4,321.48

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.