Samuel used 1 3/4 cups of dry oatmeal to make 4 servings. Which proportion could be used to calculate the amount of dry oatmeal needed to make 3 servings?

Ithink i know it but i want to be sure so can you me out ?

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?

The tree filled 3/4 of a cup in 1/2 and hour at what rate does syurup flow from the tree