Eldarion

[Galorme]

Personally I love maths and would have thought this topic would appeal to me. But you know what? I don't think the exact levels of blood from the different kingdoms was what caused anything really. If a person had elven blood then they had elven blood, regardless of badly it was watered down. Accounting for Elvish strains in other houses Aragorn's line probably lost 40% of the Elvish genetics per generation, he would have a percentage of blood somewhere around 0.0000000000002%. This would mean the chance of him even having a single Elvish gene left would be something like one in 4 million (taking the number of genes in a human as 60000, quite a generous estimation). But he still had Elvish blood, you could see it in his actions and Arwen identified him as Kin. 'Blood' is a much more mysterious and profound thing in JRRT's works that a mere case of genetics.