According to rating or valuation; at a proportionate rate; proportionally.
The Century Dictionary (Public Domain)
Use "ratably" in a sentence
"In the second quarter we expect $4.5 million, third and fourth we will have roughly $700,000 to $800,000 per quarter and the remaining $1.5 million will be expensed kind of ratably in 2010 and 2011."
"It is impractical to presume that this zero-sum-game cost approach could be implemented ratably during the first few years of any bill, but a time line based on reasonable savings estimates can be crafted if there is the will to have reform linked to a cost neutral proposition."
"Wrt revenue recognition, license revenue is recognized either at the time of sale for perpetual model or ratably for SaaS vendor, while maintenance and professional services revenues are recognized pro-rata over the course of the year/project."