CSS: create the optical illusion of a column layout using rows

I have a layout that consists of rows that contain columns (they are all divs). I want to create the illusion of a column based table, even though I am using rows.

I want each column in a row to match the corresponding column in another row’s width. So for example, column 2 in row 1 is 300px, therefore column 2 in row 2 is also 300px. But column 1 or 3 could be other widths (but equal to their corresponding column).

The tricky part is that the columns can be different widths depending on content in them, so I can just give them specific widths to start.

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Is this possible with CSS grid of flex box? Or does the fact these columns are in separate rows make it impossible without javascript?

EDIT: clarification