390 imperial quarts in dry quarts
Result
The conversion result is: 390 imperial quarts is equivalent to 402.502129960593 dry quarts.[1]
Conversion formula
How to convert 390 imperial quarts to dry quarts?
We know (by definition) that: 1 imperialquart ≈ 1.0320567434887 dryquart.
We can set up a proportion to solve for the number of dry quarts.
1 imperialquart / 390 imperialquart ≈ 1.0320567434887 dryquart / x dryquart
Now, we cross multiply to solve for our unknown x:
x dryquart ≈ (390 imperialquart / 1 imperialquart) * 1.0320567434887 dryquart → x dryquart ≈ 402.502129960593 dryquart
Conclusion:
390 imperialquart ≈ 402.502129960593 dryquart

Conversion in the opposite direction
The inverse of the conversion factor is that 1 dry quart is equal to 0.00248445890236135 times 390 imperial quarts.
It can also be expressed as: 390 imperial quarts is equal to 1 / 0.00248445890236135 dry quarts.
Approximation
An approximate numerical result would be: three hundred and ninety imperial quarts is about four hundred and two point five zero dry quarts, or alternatively, a dry quart is about zero times three hundred and ninety imperial quarts.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.