Suppose the ratio of Lev's age to Mina's age is 1 : 2 and the ratio of Mina's age to Naomi's age is 3 : 4. What is the three-way ratio of Lev's age to Mina's age to Naomi's age? Give your answer in simplest form.
l/m = 1/2
l/m * m/n = l/n = 1/2 * 3/4 = 3/8
L :M :N
3 ? 8 ? = 6 because L:m = 1/2