The part contains 43% copper, 41% iron, the remaining 288 g-nickel. How many grams does the part weigh?

To solve this problem, we introduce a conditional variable “X”, through which we denote the mass of the entire part. Now let’s determine what percentage of the mass of the part is 288 grams of nickel. As a result, we get 100% – 43% – 41% = 16%. Then, based on the data of the problem, we will compose the following proportion: X grams of a part are related to 100%, as 288 grams of nickel are related to 16%. Based on this proportion, we will compose the following equation: X = (288 x 100%) / 16%. Solving this equation, we get X equal to 1800 grams.
Answer: the part weighs 1800 grams.