HI, Don't think so. Xhigh density on the Android is defined as around 320 but includes up to 400, there are phones with higher than 400 dpi that use the 320 dpi (I think).
Think of it in the of doubling 320 dpi is 2x 160 dpi 480 dpi is 2x 240 dpi 400dpi is a bit awkward as there no clean multiplier form existing dpis. Thanks, Justin