\documentclass{article}
\usepackage[pdftex]{graphicx}
\usepackage{amsmath}
\usepackage{amssymb}
\begin{document}

foonbar

\scalebox{2.87}{foonbar}

foo

\scalebox{6.67}{foo}

bar

\scalebox{6.25}{bar}

$\mathbb{N}$

\scalebox{9.09}{$\mathbb{N}$}

foo blarb grtz baka

\scalebox{1.17647058823529}{foo blarb grtz baka}

\end{document}
