Yes, the described shield will protect a station orbiting Ganymede, but is not the right way to go about it.
While some tweaking can be achieved using graded-Z shieldingthe first order approximation for radiation shielding is by placing the maximum mass of material in the path of the radiation. For the described shield, the vast majority of the mass will be in the lead component (density 11g/cm3 vs ~1g/cm3 for the poorly defined remainder). The halving distance of lead is 4.8mm. So 1500mm of lead will get 312.5 halvings, enough to make any banana's onboard the primary source of radiation in any environment where shielding is not melting.
This shield will be massively heavy however. Each square cm of shield weighs 1700g in lead alone, so a cubical craft with same work space of the ISS (1000 cubic meters, 10 meters a side, area 6 million cm2) is going to weigh 68 thousand tonnes (ignoring corners etc).
More relevant, taking the comment from PcMan of 50-80 milli Sieverts for Ganymede, and target safe level of 1 mSv, we need 7 halvings or 7*3.4mm=23.8mm of lead. This gives a needed mass of our ISS like base of around 27 g per square cm or 162 tonnes. This is substantial (current ISS is around 400 tonnes total) but much more plausible.
Since the material of the shield is not particularly relevant, this lead can be swapped out for water tanks, food and fuel storage, and further reduced by making the shielding asymmetrical and accepting higher exposure levels.
Designing for one halving (~40mSv 3.4mm of lead/38mm of water) may be a reasonable starting point if doing design concepts.