Series electrolytics with dissimilar capacitance and voltage ratings

[neazoi]

In my circuit (Yaesu FT-101E) 300VDC is applied through a 1.5k 5w resistor to a 2.2uF 450v capacitor. It feeds the anode of a tube.

I must replace this capacitor but I have only a 10uF 200V and a 4.7uF 250V capacitor.

If I connect them in series, I will make a 3.2uF 450V synthetic capacitor.

But is it safe to do so, from the voltage perspective (dissimilar voltage and capacitance capacitor pair)?
Also, which of the two capacitors should I connect on top, closer to the 300v line (or it does not matter) ?

 

[danadakk]

Series only works if you use ballasting R's, see attached.