FRAME NUMBER 6
LEVEL A
In a ratio, the first term and the second term are individually called the antecedent and the
consequent. Hence, when referring to a ration of4
(4:5), 4 is the
and 5 is the
5
.
FRAME NUMBER 19
LEVEL B
In a proportion
2 =
4 or 2:3 = 4:6, the first and fourth terms (2 and 6) are also
called the
3
6
extremes, and the second and third terms (3 and 4) are called the means of this proportion. Then, in a
proportion 5 = 10 or 5:6 = 10:12 (6 and 10) are then
and (5 and 12) are the
.
6
12
FRAME NUMBER 32
LEVEL C
Type 4. The distance between two points on a captured enemy map is 2.54 inches. The same
distance on a map in your possession, with a scale of 1:50,000 is 6.35 inches. What is the scale of the
enemy map? We phrase this: 1:X (enemy map) is to 1:50,000 (your map) as 2.54 inches is to 6.35
inches. We write
X
=
6.35. (Note that the second part of the equation is inverted
because the
50,000
2.54
smaller the number the larger the denominator of scale.) Complete the solution: 2.54X = 317,500.
X=
Scale =
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