  It is shown that any anisotropic and inhomogeneous cosmological solution to
the lowest-order, four-dimensional, dilaton-graviton string equations of motion
may be employed as a seed to derive a curved, three-brane cosmological solution
to five-dimensional heterotic M-theory compactified on a Calabi-Yau three-fold.
This correspondence formally relates a weakly coupled string cosmology directly
with a strongly coupled one. The asymptotic behaviour of a wide class of
spatially homogeneous braneworlds is deduced. Similar solutions may be derived
in toroidally compactified massive type IIA supergravity.
