Advertisements
Advertisements
Question
Find the fourth proportion to the following:
0.7, 4.9 and 1.6
Advertisements
Solution
Let x be the fourth prcportion .
0.7 : 4.9 :: 1.6 : x
⇒ 0.7 x X = 4.9 x 1.6
⇒ x = `(4.9 xx 1.6)/0.7`
⇒ x = 11.2
The fourth proportion is 11.2
APPEARS IN
RELATED QUESTIONS
Using the properties of proportion, solve for x, given `(x^4 + 1)/(2x^2) = 17/8`.
If x, y, z are in continued proportion, prove that `(x + y)^2/(y + z)^2 = x/z`
If a, b, c are in continued proportion and a(b - c) = 2b, prove that `a - c = (2(a + b))/a`
If three quantities are in continued proportion; show that the ratio of the first to the third is the duplicate ratio of the first to the second.
If a/b = c/d prove that each of the given ratio is equal to `sqrt((3a^2 - 10c^2)/(3b^2 - 10d^2))`
Find the mean proportion of: (a – b) and (a³ – a²b), a> b
Determine if the following ratio form a proportion:
2 kg : 80 kg and 25 g : 625 kg
Show that the following numbers are in continued proportion:
16, 84, 441
In covering 111 km, a car consumes 6 L of petrol. How many kilometers will it go to 10 L of petrol?
If a, b, c are in continued proportion, prove that: `(a + b)/(b + c) = (a^2(b - c))/(b^2(a - b)`.
