Final answer:
The posterior interventricular artery, also known as the posterior descending artery, a branch of the right coronary artery, supplies blood to the inferior septal walls in a heart with right dominant circulation.
Step-by-step explanation:
The coronary artery that provides blood to the inferior septal walls in a heart with right dominant circulation is the posterior interventricular artery, also known as the posterior descending artery (PDA). This artery is a branch of the right coronary artery (RCA) that runs along the posterior portion of the interventricular sulcus toward the apex of the heart. Its branches supply the interventricular septum and portions of both ventricles. In right dominant heart circulation, the PDA, which arises from the RCA, is responsible for supplying blood to the inferior parts of the heart, including the inferior part of the interventricular septum.