Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 乔塞特买了3瓶矿泉水，花费了1.50欧元。四瓶矿泉水要多少钱？


### Response:
 一瓶矿泉水的价格是1.50 / 3 = <<1.50/3=0.50>>0.50欧元/瓶。
所以，第四瓶矿泉水要2欧元。