Finding the Third Proportional to 278.38 and 308.38

Step by Step Solution

1. Step 1: Write the proportion equation
   278.38 : 308.38 = 308.38 : x
2. Step 2: Convert to fraction form
   278.38/308.38 = 308.38/x
3. Step 3: Cross multiply
   278.38x = 308.38 × 308.38
4. Step 4: Simplify right side
   278.38x = 95,095.14
5. Step 5: Solve for x
   x = 95,095.14/278.38
6. Step 6: Final answer
   x = 341.61