In their final La Liga game of 2014, Los Blancos stretched their lead over Barcelona, who travel to Getafe on Saturday, at the top of the table to five points.
First-half goals from Isco and Gareth Bale either side of Verza's stunning equaliser yesterday sent the visitors in ahead at half-time, but they needed a big save from captain Iker Casillas when he parried Verza's penalty on the hour mark.
Ronaldo then sealed the win when he turned home crosses from Karim Benzema and Dani Carvajal to take his La Liga tally to 25 goals this season.
"Casillas managed to save the penalty in what was a defining moment, and thereafter that it was a little bit easier for us.
"We've had an unforgettable year, winning a lot of titles, especially La Decima (10th Champions League title), and are in a good position in the league. We now go to the Club World Cup with the intentions of winning it."
First Pepe and then Carvajal blocked goalbound close-range efforts from Fernando Soriano and Sebastian Dubarbier within the first three minutes.
After gaining a foothold in the game, Madrid then saw a Toni Kroos volley from outside the area deflected onto the bar by Fran Velez, before Bale failed to find an unmarked Benzema in the six-yard box after breaking down the Andalusian side's left on the quarter-hour mark.
