Finding the Third Proportional to 1,380 and 2,150

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380 : 2,150 = 2,150 : x
2. Step 2: Convert to fraction form
   1,380/2,150 = 2,150/x
3. Step 3: Cross multiply
   1,380x = 2,150 × 2,150
4. Step 4: Simplify right side
   1,380x = 4,622,500
5. Step 5: Solve for x
   x = 4,622,500/1,380
6. Step 6: Final answer
   x = 3,349.64