Dimensions panel: how to proportionaly get all 3 dimensions entering just one Is there a way to proportionaly scale an object entering a specific value in only one of the 3 dimensions? Basically I need to "link" the 3 values inside "Dimensions" so if I enter a specific value in 1 the others are automatically calculated.

Exemple: I have an object with these dimesions



I want to enter 2,5m as Y value and to automatically obtain the proportional X and Z value.
How can I do that? It's a very basic function but I can't find it.



I discovered that what I'm looking for is exactly the "Link Scale" function which was present in Transform Panel until version 2:48



I think is insane to remove a function like this. It's unbelievable ...
So.. I really thank those who are suggesting more engineering procedures but I'm looking for something easier as "Scale Link" was.
Really..  there must be a way, an addon or maybe a secret shortcut to simply link the three dimensions in the Transform Panel
It's where still the Scale operation should be used. The question is how to obtain right factor for scaling.
The brute force method is to calculate how many times is 2.5 less than 3.356:

3.356 / 2.5 = 1.342

So you want the object to become 1.342 times smaller.
Press S for Scale operation. But if entering 1.342 right now, it will scale 1.342 times bigger, not smaller. 

So the only step is to invert this. In order to avoid any 3-rd party calculations, after pressing S enter "=" sign (no quotes) which will make Blender to treat further text as formula and then 1 / 1.342. The final formula:

Press S, then = 1 / 1.342.

This method is brute force at least because final Y dimension would be 2.501 (with mentioned values). This should have to do with floating point precision.