Question

Find the fourth proportional to 3 ,6 ,5

Answer 1

Step-by-step explanation:

3,6,5

let's first find what is the sequence of order

first digit - 3

second digit - 6

third digit - 5

Now what is the relationship between first and second digits of the sequence ?

So the relationship between first and second digits of the sequence

= Relationship between 3 and 6.

6 is the second multiple of 3

3×1=3

3×2=6

Now let's see the relationship between second and third digits of the sequence.

= Relationship between 6and 5.

6 is the successor of 5 which means 5 is predecessor of 6

Now let's see what the next number can be

5 × 2 = 10

so the fourth proportional of the sequence 3,6,5 is 10

Answer 2

Answer:

• The fourth proportional to 3 , 6 , 5 is 10

Step-by-step explanation:

Given

• 3 : 6 : 5 : x

To find

• Fourth proportion (x)

Solution

• 3 : 6 : 5 : x

Product of means = Product of extremes

• 3 × x = 6 × 5
• 3x = 30
• x = 30/3
• x = 10

Hence, the fourth proportion (x) is 10

Verification

• 3 × 10 = 6 × 5
• 30 = 30
• L.H.S = R.H.S