Proportion is an important mathematical concept, which is used to describe the relationship between two or more values. The scale has four parts, namely, two vertices and two external scale items. This paper will focus on the external factor of proportion. What is the external term of proportion?

The outer term of the scale refers to the part of the scale that is not adjacent to two vertices. A ratio consists of two external terms of a ratio, and their ratio is equal to the ratio of the other ratio. The external term of proportion is a very important mathematical concept, which can be used to calculate and measure various physical quantities, such as distance, area and volume.

How to calculate the external term of proportion?

The basic formula of proportion is needed to calculate the external term of proportion. Suppose we want to calculate the external term C of the ratio a:b=c:d, we can first convert it into an equation:

a/b = c/d

Then, we can calculate the external term c by the cross product method, as shown below:

c =(a×d)/b

Alternatively, we can also calculate the external term c by cross multiplication, as shown below:

a x d = b x c

c =(a×d)/b

When is the external term of proportion useful?

External proportional terms are very useful in many situations. For example, in architecture, engineering and manufacturing, the external term proportion can be used to calculate and measure various physical quantities, such as length, width, height, area and volume. The external term of proportion can also be used to calculate the distance and speed between two objects.

In addition, in the financial and commercial fields, the external term proportion is also very useful. Proportion, an external item, can be used to calculate the ratio between the company's income and expenditure, and can also be used to calculate the company's gross profit margin and net profit margin. The external term of proportion can also be used to calculate the dividend yield and earnings multiple of stocks.

Generally speaking, the external term of proportion is a very useful mathematical concept, which can help us to calculate and measure various physical quantities and financial indicators, so as to better understand and manage our life and career.