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Finding the Third Proportional to 778.50 and 1,611.56

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Solution

The third proportional to 778.50 and 1,611.56 is: 3,336.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.50 : 1,611.56 = 1,611.56 : x
  2. Step 2: Convert to fraction form
    778.50/1,611.56 = 1,611.56/x
  3. Step 3: Cross multiply
    778.50x = 1,611.56 × 1,611.56
  4. Step 4: Simplify right side
    778.50x = 2,597,133.69
  5. Step 5: Solve for x
    x = 2,597,133.69/778.50
  6. Step 6: Final answer
    x = 3,336.07

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.