$3: 4:: X: 8$
Final Answer: The value of X is \(\boxed{6.0}\)
Step 1 :Given the proportion $3: 4:: X: 8$
Step 2 :To solve for X, we can cross-multiply and then divide by the remaining number. This will give us the value of X.
Step 3 :Cross-multiplication gives us $3 \times 8 = 24$
Step 4 :Dividing 24 by 4 gives us $X = \frac{24}{4}$
Step 5 :Solving for X gives us $X = 6.0$
Step 6 :Final Answer: The value of X is \(\boxed{6.0}\)