My baby will be 7 months next week and this is how we are fitting in solids doing the 4 hour feeds.
7am - 6 oz bottle then food (2-3 oz of cereal and fruit) so he is finished by about 7:30 or a little later depending on how fast he eats
11am - 4 - 6 oz bottle then 2-3 oz veggies (sometimes add yogurt)
3pm - 6 oz bottle
6pm - 2-3 oz veggies
get ready for bed, then
7pm 4-6 oz bottle
If I don't give him his bottle first, he will hardly drink any of it. Also, the evening feeding just works better splitting it up because he gets very tired close to bed time. I was worried that he isn't drinking as much formula, but his pediatrician said that for him, anywhere between 18 and 25 oz is good. I trust my baby knows how much he needs. Also, I was giving him cereal/rice in the evening but he started becoming very constipated and rice is a known culpret, so I cut it down to once a day and he eats prunes a few times a week.
Hope this helps