Final answer:
The first four cabinet departments after George Washington became President were the Departments of State, Treasury, War, and the Attorney General's office.
Step-by-step explanation:
The first four cabinet departments created by Congress after George Washington became President were the Department of State, the Department of the Treasury, the Department of War, and the Attorney General's office. The Department of State was responsible for foreign affairs, the Department of the Treasury for managing government revenue, and the Department of War for defense matters. Additionally, the Attorney General served as the chief legal advisor. This initial formation of departments set the foundation for the current executive departments that advise the president and help execute federal policy. Over time, the cabinet has expanded significantly from these original four to include fifteen departments as of present.