A house has decreased in value by 35% since it was purchased. If the current value is $143,000, what was the value when it was purchased?

Let x be the value of the house when it was purchased.

35/100 * x = 143000
(35/100) * x = 143000
x = 143000 * (100/35)
x = 408571.42857142855
The value of the house when it was purchased was approximately $408,571.43. Answer: \boxed{408571}.