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It might interest you to know that proportional dividers are still alive and well today because there is nothing else that can do what they can.
Put quite simply, if you need to transfer a measurement from one object to another, this is the tool. While a set of regular dividers can do that, regular dividers will only ever allow you to transfer a measurement without modification.
But what if you need to either enlarge or shrink the item to fir? That’s where these come into play. Need a 2:1 ratio? Position the pivot such that anything measured with the big end produces a measurement in the small end that is exactly one half the larger end.
I think this video sums it up quite well:
Used by artists as well
Put quite simply, if you need to transfer a measurement from one object to another, this is the tool. While a set of regular dividers can do that, regular dividers will only ever allow you to transfer a measurement without modification.
But what if you need to either enlarge or shrink the item to fir? That’s where these come into play. Need a 2:1 ratio? Position the pivot such that anything measured with the big end produces a measurement in the small end that is exactly one half the larger end.
I think this video sums it up quite well:
Used by artists as well
