No.

It means that there were 4 times as many people who valued Dark Side of the Moon than who valued Meddle.

(Example: For 5 times as many copies to be sold, there would have to have been more people who valued Dark Side of the Moon than who valued Meddle. Lets say, hypothetically, that Meddle sold 50 copies. For Dark Side of the Moon to sell 5 times as many copies (so, 250), 4 times as many people (or 200 more people) would have to value Dark Side of the Moon than the number that valued Meddle.)

So, the number of sales relates to the number of people who value the album, rather than the proclaimed "value" of the album itself. Value in itself is subjective, so by looking at the number of albums sold, one cannot determine the overall value of the album (there is no concrete value that can be placed on a product bought by numerous people for various reasons). All we know is that the number of people who felt that Dark Side of the Moon was worth their money was greater than the number who felt Meddle was worth their money.