Final answer:
Franklin D. Roosevelt served four terms as president before the 22nd Amendment was implemented.
Step-by-step explanation:
The president who served four terms before the 22nd Amendment limited a president to two terms was Franklin D. Roosevelt. He served as the President of the United States from 1933 to 1945. Roosevelt was elected for four consecutive terms in 1932, 1936, 1940, and 1944.
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