Advertisements
Advertisements
प्रश्न
If 9, x, x 49 are in proportion, find the value of x.
उत्तर
Given: 9:x::x:49
We know:
Product of means = Product of extremes
x × x = 9 × 49
⇒ x2 = 441
⇒ x2 = (21)2
⇒ x = 21
APPEARS IN
संबंधित प्रश्न
If `a/b = c/d` prove that each of the given ratios is equal to
`(5a + 4c)/(5b + 4d)`
If `(4m + 3n)/(4m - 3n) = 7/4`, use properties of proportion to find `(2m^2 - 11n^2)/(2m^2 + 11n^2)`
Find the fourth proportion to the following:
(p2q - qr2 ), (pqr - pr2 ) and (pq2 - pr2)
What quantity must be added to each term of the ratio a + b: a - b to make it equal to (a + b)2 : (a - b)2 ?
Show that the following numbers are in continued proportion:
16, 84, 441
4.5 g of an alloy of copper and zinc contains 3.5 g of copper. What weight of copper will there be in 18.9 g of the alloy?
If b is the mean proportional between a and c, prove that a, c, a² + b², and b² + c² are proportional.
If ax = by = cz; prove that `x^2/"yz" + y^2/"zx" + z^2/"xy" = "bc"/a^2 + "ca"/b^2 + "ab"/c^2`
A particular high school has 1500 students 50 teachers and 5 administrators. If the school grows to 1800 students and the ratios are maintained, then find the number of teachers and administrators
Find the missing number in the box in the proportions:
`square/18 = 2/9`
