adverb (r)

• to a proportionate degree(adv.all)

  Example:
  Your salary will rise proportionately to your workload.
  

  Synonym:
  proportionally
  Antonym:
  disproportionately
  

  source: wordnet30
• in proportion(adv.all)

  Example:
  The height of this wall must be reduced proportionately to give the room pleasant dimensions.
  

  Synonym:
  pro rata
  

  source: wordnet30
• in proportion(adv.all)

  Synonym:
  pro rata
  

  source: wordnet30
• In a proportionate manner; with due proportion; proportionally.(adverb)

  source: webster1913