Three glasses P, Q and R have capacities in the ratio 1 ∶ 2 ∶ 3. All these glasses are completely filled with mixtures of milk and water. The ratio of milk to water in P is 1 ∶ 2, in Q it is 2 ∶ 3 and in R it is 3 ∶ 1. If the content of all three glasses are put into a bigger container, what will be the ratio of milk to water in the container?