England eased to their highest one-day run chase against Australia to close in on a 5-0 series whitewash.
Jason Roy scored a superb century and Jonny Bairstow hit 79 as England surpassed the tourists' 310-8 to win by six wickets at Chester-le-Street.
Shaun Marsh and Aaron Finch had hit hundreds for Australia but the result was never in doubt once England openers Roy and Bairstow put on 174.
Jos Buttler smashed 54 from 29 balls to seal victory with 32 balls to spare.
England, who now lead the series 4-0, will complete their first one-day international series whitewash over Australia if they win the final game at Old Trafford on Sunday.