Firstly there is no ‘ideal’ current ratio – it depends on the nature of the business.
Secondly, there is no third term. The ratio might be 2.3: 1 (which is 2.3 to 1, and is the same as 2.3).
Have you watched my free lectures on this? The lectures are a complete free course for Paper FA and cover everything needed to be able to pass the exam well.