Boak believes fourth spot is gettable as White presses to return from a two-match absence due to a groin injury.
The Power have lost six of their past eight games, but the door to the top four was kept ajar last weekend when Geelong defeated Fremantle.
The Dockers sit one win ahead of Port in fourth spot on the ladder and face tough opposition this weekend in Hawthorn.
If they lose and Port beat Gold Coast on Saturday afternoon - the Power might just move into fourth place.
The Port skipper confirmed his teammates were focused on obtaining a double chance.
"It's important for the club that we get a win, it's getting pretty tight now with three games to go and [we're looking for] that top-four spot," Boak said.
"On the weekend we showed some really good stuff, our run looked like it was back and I think just our whole energy in the group has been fantastic over the last couple of weeks.
"If you're going to make a bit of a move in September, you've got to finish in the top four and for us it's just about winning our next three games.
"It starts with Gold Coast this weekend …we know it's going to be a really big challenge for us, hopefully it can kick start a bit of form."
Aiding the Power's cause will be the expected return of midfield duo White and Aaron Young.
The pair has missed the last two games with groin and foot injuries.
Both trained on Wednesday morning and Boak said they should be available for selection.
"They both look really good … spoke to 'Whitey' during the week and he said he's feeling no pain which is a great sign," he said.
"If we can get those two back up and running it'd be a fantastic inclusion into the side.
"Whitey brings that pace and that run and Youngy with his inside stuff."
Boak will run out for his 150th senior game on Saturday afternoon and said he barely recognised himself from 2007, the year he made his debut.
He has since developed into one of the game's elite, particularly after being handed the captaincy by coach Ken Hinkley ahead of the 2013 season.
Boak said he never used to think of himself as a leader and credited former captain Dom Cassisi and veteran Kane Cornes for helping develop the qualities in him required to captain the club.
"It's a great honour to play for this great club and to captain the club and play 150 games [is something] I'll probably look back at the end of my career and be pretty thankful for," he said.
"I can't even remember my first game, to be honest. I think I was pretty skinny, had long hair … a fair bit's changed.
"[Leadership's] just sort of grown on me and developed through a lot of support from Dom and Kane was my mentor when I first got to the club.”
