Given :
A = 40,229,000 is the number of Americans over age 65 in 2010.
B = 88,458,000 is the projected number of Americans over age 65 in 2050.
To Find :
The ratio of population of people of age 65 in 2010 to 2050.
Solution :
Now, ratio is given by :
Ratio,
[tex]R=\dfrac{\text{Population of people over 65 in 2010}}{\text{Population of people over 65 in 2010}}\\\\\\R=\dfrac{40,299,000}{88,458,000}\\\\R=0.456[/tex]
Therefore, The ratio of population of people of age over 65 in 2010 to 2050 is 0.456 : 1.
Hence, this is the required solution.