Question 1039748
{{{system(18/12=3/2=1.5,36/18=2,90/36=2.5,270/90=3)}}};


6*2, 6*3, 6*6, 6*15, 6*45;


6*(2),  6*(3),  6(2*3),  6*(3*5),  6(3*3*5);


Not necessarily any actual pattern.  On the other hand, the first listing shows ratio among succeeding terms to increase have 0.5.  This would make the next term be  {{{270*3.5=945}}}.