The cube root of 54 is equal to 3.78. The cube root of a number, x, is equal to the number, y, such that y times y times y equals x. For the number 54, 3.78 times 3.78 times 3.78 is equal to 54.
It is possible to simplify a cube root by factoring out the cube of a whole number. Since 54 is equal to 27 times 2, and 27 is the cube of 3, the equation can be written as the cube root of 27 times the cube root of 2. Simplified further, the equation is three times the cube root of 2.