Match ends, Ayr United 4, East Fife 1.
Craig Malcolm fired a hat-trick to secure Ayr United's play-off place by thumping an East Fife side who at least avoided outright relegation.
Arbroath drop to League Two after their defeat by Airdrieonians, while the Fifers face the League Two play-offs.
Liam Buchanan's headed consolation goal for them came eight minutes from time.
Brian Gilmour scored the other goal for an Ayr side who have been in the top four in League One all season and remain in the hunt for promotion.
After Craig Johnstone had hit the bar for the visitors early on, Ayr took the lead three minutes before the break when Malcolm's lobbed finish gave them a half-time lead.
The striker picked up where he left off after the break, with two-close range finishes completing his hat-trick.
Ayr now host Cowdenbeath in the first leg of their Championship play-off semi-final on Wednesday.
Meanwhile, East Fife travel to Cumbernauld to face Clyde, who finished fourth in League Two, in their League One play-off semi-final first leg.
- 4CampbellSubstituted forMcAuslandat 31'minutes
- 10MalcolmSubstituted forShanklandat 76'minutes
- 6O'NeillSubstituted forAustinat 59'minutes
- 8StewartSubstituted forBarrat 71'minutes
- 11McBrideSubstituted forClarkeat 76'minutes
- Crawford Allan
- Shots on Target
Second Half ends, Ayr United 4, East Fife 1.
Corner, Ayr United. Conceded by Craig Johnstone.
Attempt missed. Brian Gilmour (Ayr United) header from the centre of the box is too high.
Foul by Brian Gilmour (Ayr United).
Scott Durie (East Fife) wins a free kick on the left wing.
Attempt saved. Nathan Austin (East Fife) left footed shot from outside the box is saved in the top left corner.
Goal! Ayr United 4, East Fife 1. Liam Buchanan (East Fife) header from the centre of the box to the high centre of the goal. Assisted by Lewis Barr following a corner.
Corner, East Fife. Conceded by Gordon Pope.
Foul by Kyle McAusland (Ayr United).
Lewis Barr (East Fife) wins a free kick in the attacking half.
Corner, Ayr United. Conceded by Steven Campbell.
Attempt missed. Michael Donald (Ayr United) right footed shot from outside the box is high and wide to the right.
Corner, East Fife. Conceded by Brian Gilmour.
Substitution, Ayr United. Mark Shankland replaces Craig Malcolm.
Substitution, East Fife. Pat Clarke replaces Scott McBride.
Goal! Ayr United 4, East Fife 0. Brian Gilmour (Ayr United) right footed shot from the centre of the box to the bottom left corner. Assisted by Craig Malcolm.
Corner, Ayr United. Conceded by Joe Mbu.
Substitution, East Fife. Lewis Barr replaces Jonathan Stewart.
Attempt saved. Michael Moffat (Ayr United) left footed shot from a difficult angle on the left is saved in the bottom left corner.