Thorpe's first international appearance in his home country, at the 1998 World Championships in Perth, began with the 4 × 200 m freestyle relay. Swimming the third leg after Klim and Hackett, Thorpe broke away from 200 m butterfly Olympic champion Tom Malchow to set a split time of 1 min 47.67 s, just 0.26 seconds slower than Klim's winning time in the 200 m final. By the end of Thorpe's leg, the Australians were two seconds ahead of the world record pace, and three seconds ahead of the Americans, having extended the lead by two body lengths. Although anchorman Kowalski finished outside the world record, it was the first time that Australia had won the event at the global level since 1956. Thorpe was ranked fourth in the world before the 400 m final, which Hackett led from the outset. Hackett established a comfortable 2.29 s lead over Thorpe by the 300 m mark, and although Thorpe reduced the margin to 1.53 s at the 350 m mark, Hackett led until Thorpe passed him on the final stroke. Thorpe's time was the fourth fastest in history and made him the youngest ever male individual world champion, aged 15 years and 3 months.