  We present a correction method for the pair density (PD) to get close to the
ground state one. The PD is corrected to be a variationally-best PD within the
search region that is extended by adding the uniformly-scaled PDs to its
elements. The corrected PD is kept N-representable and satisfies the virial
relation rigorously. The validity of the present method is confirmed by
numerical calculations of neon atom. It is shown that the root-mean-square
error of the electron-electron interaction and external potential energies,
which is a good benchmark for the error of the PD, is reduced by 69.7% without
additional heavy calculations.
