Calling All Mathematicians

[addysdaddy]

3:1 = 4 parts. 10oz div. 4 = 2.5oz of the product you are going to dilute. Then add water for the remaining 7.5 oz.
10:1 = 11 32/11 = 2.9oz and 29.1 water

Dave

This is the easiest method I know of for doing the calc. Easy & accurate

[DogRescuer]

Awesome, math was never my strong suit.

[oneheadlite]

Awesome, math was never my strong suit.

Right there with ya man!

[andy0902]

To be even more pedantic:
X = Volume of Concentrate
4X = Volume of water For a 4:1 dilution

To make a quart of final solution:
X + 4X = 32
5X = 32
X = 6.4 = Volume of Concentrate to use
4X = 25.6 = Volume of water

I know, you can imagine what party conversation with me is like.

[oneheadlite]

To be even more pedantic:
X = Volume of Concentrate
4X = Volume of water For a 4:1 dilution

To make a quart of final solution:
X + 4X = 32
5X = 32
X = 6.4 = Volume of Concentrate to use
4X = 25.6 = Volume of water

I know, you can imagine what party conversation with me is like.

Thanks for breaking it down and making very easy to look at/solve!

[kevincwelch]

To be even more pedantic:
X = Volume of Concentrate
4X = Volume of water For a 4:1 dilution

To make a quart of final solution:
X + 4X = 32
5X = 32
X = 6.4 = Volume of Concentrate to use
4X = 25.6 = Volume of water
.

I love it when people break out the algebra!

This really is the easiest method and is the most accurate.

I recommend that you get yourself some good quality measuring beakers that have oz and mL markings. These beakers and easy math make quick work of doing dilutions.

[golliger]

I just let someone else worry about the math.
http://www.enviro-one.com/dilution-calculator/

[DogRescuer]

Lol

Thanks for breaking it down and making very easy to look at/solve!

[bill110]

Bottom line is I'm trying to learn how to figure out which product is cheaper.

Once you figure out how many ounces of mixed solution you have, you can also then determine the price per oz. of mixed solution.
in your example of 4:1 you would have 640 oz of mixed solution.
divide the price of the product by 640 to get cost per oz.
Example:
product cost = 12.80 per gal
640/12.8 = .02; or 2 cents per oz.

doing it this way you can easily compare a 16oz bottle of one product with a 12oz bottle of another

[ducksfan]

Just to clear things up a bit on ratios. They are generic. As in, they can be used with any unit of measure (ounces, gallons, liters, etc). But you have to use the same unit of measure on both sides of the ratio. If they are different, you have to convert one to match the other.

Now, I know that sometimes ratios are presented with different units of measure specified. But that is different from has been discussed here.