Final Answer:
Approximately 186.67 million Americans know who the vice president is.
Step-by-step explanation:
To find the number of Americans who know who the vice president is, we use the given ratio. If 2 out of 3 Americans know, we can calculate it as (2/3) * 280 million = 186.67 million. This implies that approximately 186.67 million Americans are knowledgeable about the vice president.
It's important to note that this is a theoretical calculation based on the given ratio, and the actual number of Americans who know the vice president may vary.
The ratio serves as a proportion to estimate the portion of the population with this specific knowledge.