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B, may be found in the same manner, for it will be the same as a fourth proportional to the three lines A, B, B. PROBLEM IIL To find a mean proportional between two given lines A and B.
Elements of Geometry: On the Basis of Dr. Brewster's Legendre : to which is ... - Page 118
by James Bates Thomson - 1844 - 237 pages

## Elements of Geometry and Conic Sections

Elias Loomis - Conic sections - 1860 - 246 pages
...have Cor. In the same manner may be found a third proportional to two given lines A and B; for this will be the same as a fourth proportional to the three lines A. B, B. AB : BD : : AC : CE (Prop. XVI., B. IV.). PROBLEM XIX. To find a mean proportional between two given...

## Elements of Geometry and Conic Sections

Elias Loomis - Conic sections - 1861 - 244 pages
...IV.). Cor. In the same manner may be found a third proportional to two given lines A and B ; for this will be the same as a fourth proportional to the three lines A, B, B, PROBLEM XIX. To find a mean proportional between two given lines, Let AB, BC be the two given straight -^ lines...

## Elements of Geometry and Conic Sections

Elias Loomis - Conic sections - 1861 - 254 pages
...IV.). Cor. In the same manner may be found a third proportional to two given lines A and B ; for this will be the same as a fourth proportional to the three lines ABB PROBLEM XIX. To find a mean proportional between two given lines. Let AB, BC be the two given straight...

## Elements of Geometry and Trigonometry: With Practical Applications

Benjamin Greenleaf - Geometry - 1862 - 520 pages
...XVII. Cor. 1, Bk. IV.), AB: AD : : AE : AC. 328. Cor. A third proportional to two given lines, A and B, may be found in the same manner, for it will be...as a fourth proportional to the three lines, A, B, and B. PROBLEM XXVI. 329. To find a mean proportional between two given straight lines. Draw the indefinite...

## Elements of Plane and Spherical Trigonometry: With Practical Applications

Benjamin Greenleaf - Geometry - 1861 - 628 pages
...XVII. Cor. 1, Bk. IV.), AB: AD : : AE: AC. 328. Cor. A third proportional to two given lines, A and B, may be found in the same manner, for it will be...as a fourth proportional to the three lines, A, B, and B. PROBLEM XXVI. 329. To find a mean proportional between two given straight lines. Draw the indefinite...

## Elements of Plane and Spherical Trigonometry: With Practical Applications

Benjamin Greenleaf - Geometry - 1862 - 514 pages
...Cor. A third proportional to two given lines, A and B, may be found in the same manner, for it will he the same as a fourth proportional to the three lines, A, B, and B. PROBLEM XXVI. 329. To find a mean proportional between two given straight lines. Draw the indefinite...

## Elements of Geometry: With Practical Applications to Mensuration

Benjamin Greenleaf - Geometry - 1863 - 504 pages
...XVII. Cor. 1, Bk. IV.), AB : AD : : AE : A C. 328. Cor. A third proportional to two given lines, A and B, may be found in the same manner, for it will be...as a fourth proportional to the three lines, A, B, and B. PROBLEM XXVI. 329. To find a mean proportional between two g~iven straight lines. Draw the indefinite...

## Elements of Geometry: With Practical Applications to Mensuration

Benjamin Greenleaf - Geometry - 1868 - 338 pages
...XVII. Cor. 1, Bk. IV.), AB: AD : : AE : AC. 328. Cor. A third proportional to two given lines, A and B, may be found in the same manner, for it will be...as a fourth proportional to the three lines, A, B, and B. • PROBLEM XXVI. 329. To find a mean proportional between two given straight lines. Draw the...