Anyone good at math?

Question

I'm trying to figure out the pattern to find out what the next number would be. They are in cubic inches (if that helps; I'm not sure if that's needed or not to figure the pattern out).

Anyway, the numbers are:

427, 256, 312, 546, 656, 823, (next number here)

Thanks in advance to anyone that can help me out!! :D

Answer 1

I just answered a question very similar to this, but it was phrased as a riddle about burrowing out dirt.

"...after tea, they decided to burrow out a larger burrow.
In the first hour, they burrowed out 427 cubic inches of dirt.
In the next hour, they burrowed out 256 cubic inches of dirt.
In the third hour, they burrowed out 312 cubic inches of dirt.
In the fourth hour, they burrowed out 546 cubic inches of dirt.
In the fifth hour, they burrowed out 656 cubic inches of dirt.
In the sixth hour, they burrowed out 823 cubic inches of dirt.
They continued for one more hour after that.

How many cubic inches, total, did they burrow in those seven hours?"

I believe the answer is:
--> No dirt was burrowed *in* those seven hours; it was all burrowed *out*

Not a math problem at all!

Answer 2

Not particularly. Is this part of a larger problem or riddle? I've added and subtracted the numbers and haven't gotten anything yet.