The phrase "a relatively obvious" is correct and usable in written English.
It can be used when describing something that is clear or evident to a certain degree, often in comparison to other things.
Example: "The solution to the problem was a relatively obvious choice given the circumstances."
Alternatives: "somewhat clear" or "fairly evident".
In this study, it was shown that the hemolytic activity assay has a relatively obvious relationship with the qualitative oil-spreading and drop-collapse tests.
In fact, even a relatively obvious dimension, such as accuracy, does not have a sufficiently robust definition to make techniques apparent as to how to measure the accuracy of data.
But this is a relatively obvious gross-out, a purely physical shock, compared to his more psychologically unfettered performances which can linger in the mind, unresolved, probing to the quick of one's memory.
But the long-term advantages of electric trucks could make a lot of sense, both from a relatively obvious ecological perspective, which is obvious, and from the perspective of cost-effectiveness.
This seems like a relatively obvious statement for a CEO candidate running a company like Twitter but, at the same time, seems a little bit like a nod at the current — and potential — situation of Twitter's interim CEO Jack Dorsey running both Twitter and Square.
It's a relatively obvious choice for the Attorney General to have made.
The broad contours of a solution seem relatively obvious: create a safe viewing area elsewhere inside GriffithPark and crack down on the tour buses, illegal parkers and smokers until they are duly deterred.
"Factually, this looks like an acknowledgment of relatively obvious things," Mr. Navalny said.
At a first glance this association may seem relatively obvious; copying a line is clearly dependent upon the ability to look at the same line while drawing, just as tracking a moving object smoothly depends upon the same ability.
"A company that collects data to see how well its marketing programs are working ought to be able to accept a responsibility to see where relatively obvious instances of abuses are occurring," Mr. Greenwood said.
Governments (rightly or wrongly) have to a large extent taken the credit for that 'progress', but in any event it is relatively obvious that a large, well-populated, well-heeled and motivated machine like a government could -- at least in theory -- be ideally positioned to deliver on those basic needs (though in practice the experiment that was the USSR suggests otherwise).
