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Euclid: Elementa

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gre V,0
ζ᾽ Ὅταν δὲ τῶν ἰσάκις πολλαπλασίων τὸ μὲν τοῦ πρώτου πολλαπλάσιον ὑπερέχῃ τοῦ τοῦ δευτέρου πολλαπλασίου, τὸ δὲ τοῦ τρίτου πολλαπλάσιον μὴ ὑπερέχῃ τοῦ τοῦ τετάρτου πολλαπλασίου, τότε τὸ πρῶτον πρὸς τὸ δεύτερον μείζονα λόγον ἔχειν λέγεται, ἤπερ τὸ τρίτον πρὸς τὸ τέταρτον.
eng
7. When, of the equimultiples, the multiple of the first magnitude exceeds the multiple of the second, but the multiple of the third does not exceed the multiple of the fourth, then the first is said to have a greater ratio to the second than the third has to the fourth.
lat Sic
Quando autem eque multlplicium multiplex quidem primi superat multiplex secundi, multiplex autem tertii non superat multiplex quarti secundum aliquam multiplicitatem, tunc primum ad secundum maiorem proportionem habere dicitur quam tertium ad quartum.
lat Gerard
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lat Adelard
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lat Hermann
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ara Uppsala
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ara Tuṣi
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ara Nairizi
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san
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lat Clavius
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kin 幾何原本 p. 221-222
第八界
四幾何。若第一之幾倍。大於第二之幾倍。而第三之幾倍。不大於第四之幾倍。則第一與二之比例。大於第三與四之比例。
此反上第六界。而釋不同理之兩比例。其相視。曷顯為大。曷顯為小也。謂第一、第三、之幾倍。與第二、第四、之幾倍。依上累試之。其間有第一之幾倍。大(p. 二二二)於第二之幾倍。而第三之幾倍。乃或等、或小、於第四之幾倍。卽第一與二之比例。大於第三與四之比例也。如上圖。甲一、乙二、丙三、丁四。甲與丙。各三倍、為戊、己。乙與丁。各四倍、為庚辛。其甲三倍之戊。大於乙四倍之庚。而丙三倍之己。乃小於丁四倍之辛。卽甲與乙之比例。大於丙與丁也。若第一之幾倍。小於第二之幾倍。而第三之幾倍。乃或等、或大、於第四之幾倍。卽第一與二之比例。小於第三與四之比例。如是等、大、小、相戾者。但有其一。不必再試。
以數明之。中設三、二、四三、四幾何。先有第一之倍。大於第二之倍。而第三之倍。亦大於第四之倍。後復有第一之倍。大於第二之倍。而第三之倍。乃或等、或小於第四之倍。卽第一與二之比例。大於第三與四也。若以上圖之數反用之。以第一為二。第二為一。第三為四。第四為三。則第一與二之比例。小於第三與四。
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