Using concept of ratio and proportions the constant of proportionality between the two feed is 0.63
This is a value that is constant between two quantities that are proportional to one another.
Proportionality can be defined as comparing two ratios with one another and the constant of proportionality gives us a value to how they are to one another.
Let's convert the mixed fractions into decimal numbers
Sunflower seed = 2 1/3 = 2.3 lbs
Peanut = 5/6 = 0.83 lbs
The total mass is 2.3 + 0.83 = 3.13lbs
The proportionality between cracked corn to bird seed will be
k = 3.13 / 5 = 0.63
The proportionality between the two is 0.63
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