gistfile1.rb

#!/usr/bin/ruby
require 'pp'

sets = [ 
  [1, 2, 3], 
  [10, 20, 30, 40, 50, 55, 56],
  [100, 200, 300, 400, 500, 600, 700]
]

scale = sets.flatten.max

# Get the max - min for each set.
normalized = sets.map do |set|
  set.map {|value| scale * value.to_f / set.max }
end
pp normalized