However, there are a few things to clarify:
* The Hobbit Trilogy: There are three *Hobbit* movies, which are prequels to *Lord of the Rings*. They tell the story of Bilbo Baggins's adventures before the events of *The Fellowship of the Ring*.
* The Lord of the Rings: The Rings of Power: This is a separate TV series set thousands of years before the events of *The Hobbit* and *Lord of the Rings*. It explores the Second Age of Middle-earth, a time of great power and the forging of the Rings.
* The Lord of the Rings: Return of the King Extended Edition: This is an extended version of the third movie, containing extra scenes that were cut from the theatrical release. It's still considered part of the original trilogy.
So, while there's no fourth movie in the main *Lord of the Rings* trilogy, there are other related projects that expand on the universe created by J.R.R. Tolkien.