1.5 meters
If driving in the same direction as the cyclist is riding 5 to 6 feet should be a good safe distance. It be a good idea to slow down till past the cyclist... Actually, you don't need to slow down as you pass them as long as you are at least 2 feet from them. It can be considered condescending behavior to treat a cyclist in any way different than you would treat them if they are in a car. Remember, they are not helpless, they are not children, they are not fragile, and they need no special considerations that you would not give other drivers.
The commonsense answer is to leave the amount of room that the cyclist would occupy if he fell from his bike, and that includes space for the fallen bike too, and even more to make certain.
Three feet or one meter. And that's from the closest edge of the cyclist's body or the bike's handlebars, whichever sticks out more. Don't measure from the tire track on the ground. Georgia has an actual law making the 3-foot rule a traffic law. In some other states it's a good idea.
200 feet
Approximately 413 give or take.
3 feet
5280
319M = 1046.588 feet, give or take...
100 feet
There are 3 feet to a yard. This would give you 81 feet.
Two syllables. Cy-clist.