Question : The first, third and fourth terms of a proportion are 8, 16, and 6 respectively. What is the second term?
Option 1: 3
Option 2: 6
Option 3: 8
Option 4: 12
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Correct Answer: 3
Solution : Given: The first, third and fourth terms of a proportion are 8,16 and 6 respectively. Let the second term be $x$. According to the question, $8:x::16:6$ ⇒ $\frac{8}{x}=\frac{16}{6}$ ⇒ $16x=48$ ⇒ $x=3$ So, the second term is 3. Hence, the correct answer is 3.
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Question : Directions: Select the option that is related to the fifth term in the same way as the second term is related to the first term and the fourth term is related to the third term.
P 2 : R 4 :: D 5 : F 7 :: X 6 : ?
Question : If the third proportion of 3 and $x$ is 27 and the third proportion of 2 and $y$ is 8, then find $x : y$.
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Question : Directions: Select the option in which the numbers are related in the same way as the numbers of the following sets. (8, 12, 48) (6, 18, 54)
Question : Of the three numbers, the first is twice the second, and the second is twice the third. The average of the reciprocal of the numbers is $\frac{7}{12}$. The numbers are:
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