You have it right, but your sentences are missing periods. Also, I think "US" is correct, but if you place a period after one letter (abreviation) you should also place one after the other. I suppose you could argue that "Three people own bicycles," is correct.
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KprasadreddyThree out of every four automobile owners in the U.S also own a bicyle
One out of every four automobile owners in the U.S also owns a bicyle
KprasadreddyThanks but can you explain the grammar behind it?In your first example, "three" is the subject of the sentence. The prepositional phrase "out of etc