Align multiple text ruby prawn report

Hi I'm creating a PDF with prawn, how can I do to align the texts here that you see in the image below at the same height?

<pre>Prawn::Document.generate("my.pdf") do
  image logo,:width=>540,:height=>60
  text "Spett.le ",:align=>:right
  move_down 5
  text "\n"+ragionesociale, :align => :right
  text "Data:  "+stringDate
  move_down 10
  text "Nome Cantiere:     "+nomecantiere
  move_down 30
  text "Note: "+note
  move_down 30
  end