As per International Monetary Fund (IMF) 2019 estimates, the GDP (nominal) of South Africa is USD 358,839 million. This GDP (nominal) is around 0.41% of Entire World’s GDP. Currently (2019), the world rank of South Africa is 35 in terms of GDP Nominal.
However, as per 2018 estimates by World Bank, the GDP (Nominal) of South Africa is USD 368,288 million. As per World Bank Estimates, the global rank of South Africa is 33.

South Africa GDP [PPP]

On the other hand, as per 2019 estimates by International Monetary Fund, the GDP (PPP) of South Africa is USD 809,034 Million. This is 0.57% of World. South Africa on this basis has a global rank of 30.

South Korea GDP [PPP]

On the other hand, as per 2019 estimates by International Monetary Fund, the GDP (PPP) of South Korea is USD 2,319,585 Million. This is 1.64% of World. South Korea on this basis has a global rank of 14.