Question 1204480
If they are in geometric progression then you have these:
{{{N=1/M}}}


The very simplest of algebra gives {{{MN=1}}}.


This should still be checked with the first given term.
{{{1/M=M/(4/3)}}}

{{{1/M=(3M)/4}}}

{{{4/M=3M}}}


{{{4/3=M^2}}}

{{{M=2/sqrt(3)}}}-----but this seems completely unrelated to the actual question for the problem.




(second part was rechecked)