Starting with the second question the relics boost can be found on the wiki
here. You take your base production (100%) and then and in your relics boost (up to 700%), if you have the mountain halls you can then add that percentage in as well (note that in some place the MH bonus shown includes the 100% base so you may have to subtract that out). The total percentage is displayed in the main hall under the relics tab (shortcut "S" key).
For the actual productions, they remain roughly proportional. For example steel at level 2 in the wiki is shown to produced 8, 15, 25, 37 for its 3hr, 9hr, 1 day, 2 day respective productions. That 8:15:25:37 ratio roughly holds for all its levels. The nonboosted daily production shown in the wiki is the 1 day production on the manufactory, so to convert that to 3 hour productions multiply by 8/25.