proportion

Ratio and proportion are the mathematical concept that basically deals with expressing the relationship between similar kinds of values. The concept of ratio can be define as a way to perform the task of comparing the two values to each other and represent their relationship between them. On the other hand, the concept of proportion can be described as tools that perform the task of equalizing the two ratios to each other. (Know more about proportion in broad manner, here,)

In a simple mean we can say that proportion is a way to set two ratios as equal. It means proportion is a special term of an algebra equation to compare two ratios or make them as equivalent fractions. In ratio, we just focus on what is the impact on another number when we make any changes in first number. But in proportion we need to focus to equalize the one ration to another ratio. Generally the concept of ration can be represented by using four variables u, v, w and x as:

 u : v = w : x,

 or

u / v = w / x.

Normally in the case of proportion, mostly we need to calculate the unknown value of the ratio. To perform the task of getting the unknown value of proportion we need to follow some of the task that are given below:

Suppose there is a statement in which we need to calculate the value of n in below given proportion.

6 / 15 = n / 10

Here first we need to perform the task of cross multiplication of proportional values:

   6 * 10 = n * 15,

    60 = n * 15,

    n * 15 = 60,

      n = 60 / 15,

     n = 4.

Now using the value of n we can represent the proportion as;

6 / 15 = 4 / 10

In mathematics,  Discrete Variable can be define as  a variables that can't be take all values through out the limits of the variable. In examination, cbse previous year question paper describe possibility of what type of questions have higher possibility to come in exam.