If a dot was added to a quarter note in 4/4 time, how many beats is the note worth?

1 and a half (1 1/2) because a dot adds half or the value of the original note for example if you have a half note which is two beats and you add a dot the dot is now worth 1 beat (2 * 1/2), which make the it 3 beats and that not is called a dotted half note ...