This paper explains the characteristics of Transverse Mercator projections, the relationship of plane grids to USGS map cells, and the reasons DRG's and other USGS digital products are projected on the UTM.
âº If two amounts are proportional, they change at the same rate so that the relationship between them does not change: 1  Weight is proportional to size. 2  How far you go is directly proportional to how fast you go (= as one thing increases, the other increases at exactly the same rate).
Updated July 12, 2017. Inverse Proportion Definition: Inverse proportion is the relationship between two variables when their product is equal to a constant value. Examples: The volume of an ideal gas is inversely proportional to the pressure of the gas (Boyle's Law) Direct Proportion Definition. Know the Major Laws of Chemistry.