Just ADD 1 +3 then subtract it from 1.4 inch
Im not entirely sure what the scale factor is, but i do know that 10 ft is 20 times bigger than 6in, 4 cm is 16 times bigger than 2.5mm, and that 15 yards is 9times bigger than 5ft. If that helps at all
P(y)=ir^t
233=231r^(1999-1991)
(233/231)^(1/8)=r
p(y)=231(233/231)^((y-1991)/8) so in 2003
p(2003)=231(233/231)^((2003-1991)/8)
p(2003)=231(233/231)^(1.5)
p(2003)=234
So 234 million (to the nearest million people)