Scale gameobject fit the screen?

How to scale the gameobject to fit the screen if i change my aspect ratio 16:9 to 4:3?
Really can't find from google,
any help?

 

Let's say you want to scale image 1600x900 (16:9) to fit to 800x600(4:3).
scale.x = 800/1600 = 0.5
scale.y = 600/900 = 0.66

Another example.
If you have original image of 1600x900 and you want to fit it to 4:3 aspect ratio w/o changing its height.
The new image dimensions will be Wx900.
H = 900
W= ?
H/W = 4/3
W = H*3/4 = 900*0.75 = 675
scale.x = 0.75

Hope it answers your question.

 

let say my gameoject is red part like this

the size is 1600x150
if changing to 4:3 screen,
how i should write for that?
still use your method?
one more question,
how to check my screen ratio aspect?
thanks for reply

 

To compute the ratio you have to divide Screen.width though Screen.height like this:

Code (CSharp):

1. float ratio=Screen.width/Screen.height;
2.  

 

it's always return float 1,
it will not change whenever i change ratio in game view