As it has become increasingly obvious films do not have to have huge takes in the US to be viewed as successful, the first Pacific Rim was one that got approved for a sequel based on the $100 plus million it did in China. In the case of Rampage it's China box office is none to shabby, it currently is at nearly $155 million.
To compare only Kong: Skull Island (of the recent giant monster films) was higher with $168 million, and many Marvel films failed to beat it, even Black Panther which hit only about $105 million there. China is the second biggest market behind the US so a films success there is a big deal and helps in a films bottom line and approval for sequels. $400 million is the sort of magic number for success for big blockbusters (depending on budget, promotion), Rampage falls into that category.
Below is a comparison to other similar action films.
- Avengers: Age of Ultron (2015) - $240,110,000
- Jurassic World (2015) - $228,740,000
- Ready Player One (2018) - $220,036,012
- Avengers: Infinity War (2018) - $200,486,738 (currently opened 5/11)
- Captain America: Civil War (2016) - $180,794,517
- Kong: Skull Island (2017) - $168,188,002
- Rampage (2018) - $154,676,650
- Star Wars: The Force Awakens (2016) - $124,159,138
- Spider-Man: Homecoming (2017) - $116,280,889
- Thor: Ragnarok (2017) - $112,226,154
- War for the Planet of the Apes (2017) - $112,150,301
- Pacific Rim (2013) - $111,940,000
- Justice League (2017) - $106,052,345
- Black Panther (2018) - $105,062,459
- Guardians of the Galaxy Vol. 2 (2017) - $100,663,260
- Pacific Rim Uprising (2018) - $99,488,362
- Wonder Woman (2017) - $90,498,909
- Godzilla (2014) - $77,630,000
- Rogue One: A Star Wars Story (2017) - $69,484,899
- Star Wars: The Last Jedi (2018) - $42,577,974