  We present the results on the ratios $E_{1+}^{(3/2)}/M_{1+}^{(3/2)}$ and
$S_{1+}^{(3/2)}/M_{1+}^{(3/2)}$ for the $\gamma^* N \to \Delta(1232)$
transition at $Q^2\leq 4 (GeV/c)^2$ extracted from the $p(e,e'p)\pi^0$ cross
section using two approaches: dispersion relations and modified version of
unitary isobar model. The obtained results are in good agreement with the
results of other analyses obtained using truncated multipole expansion at
$Q^2=0.4,~0.525,~0.65,~0.75,~0.9,~1.15,~1.45,~1.8 (GeV/c)^2 $ and within
dynamical and unitary isobar models at $Q^2=2.8,~4 (GeV/c)^2 $. According to
obtained results the ratio $E_{1+}^{(3/2)}/M_{1+}^{(3/2)}$ remains small in all
investigated region of $Q^2$ with very unclear tendency to cross zero above $2
(GeV/c)^2$. The absolute value of the ratio $S_{1+}^{(3/2)}/M_{1+}^{(3/2)}$ is
clearly increasing with increasing $Q^2$, while it should be a constant value
in the pQCD asymptotics. So, at $Q^2\leq4 (GeV/c)^2$ there is no evidence of
approaching pQCD regime for these ratios. None of the soft approaches gives
satisfactory description of the obtained results.
