Final answer:
A corporal in the Army is at paygrade E-4, which is equivalent to the Navy rank of Petty Officer Third Class. The military paygrade system is similar to the General Schedule (GS) system for federal employees, providing a framework for compensation based on rank, experience, and education.
Step-by-step explanation:
The question asks about the equivalent paygrade of a corporal in the Army compared to ranks in the Navy. In the U.S. military, paygrades help to standardize pay across the different service branches. A corporal in the Army is at paygrade E-4. In the Navy, an E-4 paygrade corresponds to the rank of Petty Officer Third Class.
In terms of compensation, paygrades are part of a larger General Schedule (GS), which determines the pay for federal positions based on experience, education, and level of responsibility. While military paygrades share similarities with the GS system, they are distinct in that they specifically relate to military service members. As one serves their country, there are opportunities to advance in rank and paygrade, which can lead to increased pay and retirement benefits.