Resistors usually come in standard values, and I for one don't have all of those.
But they can be put together in serial and/or parallel to make almost any value.
Here is a link showing voltage divider and formula. That's a really good site, you might bookmark it.
If R1 is 2000 ohms (2 1K's in series for me) and R2 is 4700 ohms the Vo would be 3.5V.
Notice that Voutput = Vsource x ( R2 / ( R1 + R2 ))
( R2 / ( R1 + R2 )) gives the fraction of source voltage that output voltage will be independent of source.
I used 3 x 4.7K resistors to make a 1/3 drop by putting 2 in series to make R2 and the other to be R1.
My output voltage is 2/3 which for 5V is 3.3V. To get 3.5 I varied the ratio so that less goes straight to ground.
My output current runs through the 4.7K resistor so it will be less than if no divider is present but I don't need much current, it is for voltage-leveling a serial pin on a 3.3V chip to a 5V Arduino. I used 4.7K's so that less current would flow to ground than with lesser ohms.
That may be more resistance than you want, the 2K-4.7K example above is half as much. Still, you may need to play around to get just what you want/need.