Mike wants to make meatloaf. his recipe uses a total of 5 pounds of meat. if he uses a 3 to 1 ratio of beef to pork, how much pork will he use?

Ratio of beef to pork =  3 : 1

Beef:Pork = 3 : 1

Total ratio = 3 + 1 = 4

Amount of pork: Fraction of Pork = 1/4 of the whole meat

(1/4)*5 = 5/4 = 1.25

Amount of Pork = 1.25 pounds. 

Hope this explains it.