The law enforcement officers searched the house of co-occupants ron, jeff and joe for firearms without a warrant. ron consented to the search, while the others objected to the intrusion of their privacy. is this a violation of the fourth amendment?

The Fourth Amendment is part of the Bill of Rights, initially imposed the idea that "each man's home is his castle" this means that the fourth amendment forbids unreasonable searches and appropriations. So the answer is yes because other co-occupants current at the time for the search had opposed to the search.