Fifth women's one-day international, Potchefstroom
England 254-9 (50 overs) beat South Africa 216 (48.5 overs) by 38 runs. England Women completed a 4-1 one-day series victory over their South African counterparts with a 38-run win in the final match.
Spinner Rosalie Birch continued her fine form on tour with 5-50 to bowl the home side out for 216 in the 49th over.
Johmari Logtenberg top-scored for the home side with 76 from 73 deliveries but she found little support.
Charlotte Edwards was again England's leading scorer with 81, Birch's 42 helping the tourists to 254-9.
South Africa Women: A L Hodgkinson (capt), S Pillay (wkt), M Terblanche, J Barnard, J Logtenberg, A E Smith, C S Terblanche, C van der Westhuizen, S A Fritz, S S D van Zyl, A P C Kilowan
England Women: C J Connor (capt), J Smit (wkt), C M Edwards, L K Newton, S C Taylor, L Greenway, A Brindle, R A Birch, C E Taylor, L C Pearson, I T Guha