2. When a () or () or (), these four numbers can form a proportion

2. When a () or () or (), these four numbers can form a proportion

2. When a = (2 / 15) or (30) or (0.3), these four numbers can form a proportion

5,1.2,3 and a when a = () or ()

2 or 1.25

There are () numbers that can be proportional to 3,4 and 6, of which the largest is ()

There are (2) numbers that can be proportional to 3,4 and 6, and the largest one is (8)

What is the ratio of 1.6, 4 and 6.4 with a number?

1.6×4÷6.4=1 1.6:6.4=1:4
1.6×6.4÷4=2.56 1.6:4=2.56:6.4
4×6.4÷1.6=16 4:1.6=16:6.4

Use three, four, six, eight to make up eight proportions

3:4=6:8
4:3=8:6
3:6=4:8
6:3=8:4

0.5, 3 / 4, 6 and another number can form a proportion. What is the number possible?

0.5：（3/4）=6:9
This number could be nine

There are three numbers: 1.5, 4 and 6. Add one more number to make up the proportion?

4×6÷1.5=16
The number is 16

5 two thirds and 0.4 can form a proportion with another number, which can be () or () fast

5×2/3÷0.4=25/3
5×0.4÷2/3=3
0.4×2/3÷5=4/75

3, 4, 5 and some number can form a proportion. What is the maximum number

The maximum number is 20 / 3
4 times 5 divided by 3 = 20 / 3
Because the number must be the largest, then it must be the outer or inner term with the smallest number

Ninety-one 3，2 3，4 5 and 2 These four numbers can be proportional______ .

Because in these four numbers,
The product of any two numbers is not equal to the product of the other two numbers,
Therefore, these four numbers can not form a proportion;
So the answer is: wrong