3 and 1/7
Thom failed to include another approximation.
392.7/125 = 3.1416 exactly - again this is posibly a key omission.
Immediately there is a very strong suspicion that the builders were manipulating Pi.
One more to add to this list
And Peter Harris' Pi of 22/7 x 16499/16500 = 3.142666667
So five approximations of Pi from various sources.
22/7 is the greatest value and is at the top of the scale and we know that it works in Michell's Canon of Ancient Measure as 22/7 x 42000000 = 132000000
So the values can all be expressed using Michell's Canon of Ancient Measure as follows
A 22/7 x 42000000 = 132000000 The most well known ancient unit.
B 22/7x16499/16500 = 131992000 the Harris and Stockdale Pi unit
C 3.1416 = 131947200 From Thom page 47
D 3.14 = 131880000 From Thom page 47
E 3.139 = 131838000 From Thom page 47
A - B = 8000
A - C = 52800
A - D = 120000
A - E = 162000
B - C = 44800
B - D = 112000
B - E = 154000
C - D = 67200
C - E = 109200
D - E = 42000
Some interesting values here and solid evidence supporting the Harris and Stockdale Megalithic Foot as a significant metrological discovery as recent as last year.
I tried to fit Jim Wakefield's fibonacci Pi of 3.1418181818r into this list but it seemed not to fit.
However against 3.1416 it gives
C 0.000218182 (a-b)
A/C = 14400
B/C = 14399
an excellent fit
Edited 3 time(s). Last edit at 05-Jan-18 21:18 by DavidK.