It will probably run, but it wont run well at all even on low.
I recently configured an OLD first gen I7 with 8 gigs of RAM and a gtx 660 to play ark, so that is my point of reference.
http://gpu.userbenchmark.com/Compare/Nvidia-GTX-660-vs-Nvidia-GeForce-GT-730/2162vsm12582
I spent quite a bit of time tweaking settings to make it not look horrible and still run OK. The GTX 660 is many times better than a GT 730 and it really struggles in ARK.
A GT 730 has 3 different versions which are also significantly different. Do you have the GDDR5 version? 1GB or 2GB? Depending on which one you have you will experience different levels of struggle.
https://www.geforce.com/hardware/desktop-gpus/geforce-gt-730/specifications
In the end it will probably run, but a very large part of playing ARK is to enjoy the scenery, and I would say it is not worth it without upgrading first.
A game like Factorio will probably work quite well though on that system, though obviously it is not ARK but it is an amazing game to play with low specs.