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To determine the correct volume needed for each dose, we need to convert the prescribed dosage of Drug K into the volume based on its concentration. The prescription specifies 250 mg of Drug K to be administered in each dose, and the concentration of the drug is given as 25 mg per 5 ml.

First, we can establish how much volume corresponds to 250 mg by using the concentration:

1. We know that 25 mg is contained in 5 ml, so to find out how many milliliters contain 250 mg, we can set up a proportion.

2. If 25 mg is in 5 ml, then to get the volume for 250 mg, we multiply both the mg and the ml by 10:

- 25 mg × 10 = 250 mg

- 5 ml × 10 = 50 ml

Thus, each dose of 250 mg of Drug K corresponds to 50 ml based on the available concentration of 25 mg per 5 ml. This calculation confirms that the amount needed for each dose is indeed 50 ml.