CREATE TABLE table_73649 ("WEEK" FLOAT, "Sydney" FLOAT, "Melbourne" FLOAT, "Brisbane" FLOAT, "Adelaide" FLOAT, "Perth" FLOAT, "TOTAL" FLOAT, "NIGHTLY RANK" FLOAT)

What was the rating in Brisbane the week it was 276000 in Melbourne?
SELECT MAX("Brisbane") FROM table_73649 WHERE "Melbourne" = '276000'
SELECT MAX("Brisbane") FROM "table_73649" WHERE "Melbourne" = '276000'