Generally to filter the map ratios you have to use the same calculated field in the filters and show the same filter on the dashboard!
If you need correct solution update the same problem with some screenshot
This can done using parameters. Create a parameter.
Create a calculated field.
Create your view and use the calculation.
I've also attached a workbook for your reference.
Let me if this solves your issue or not.
Dynamic ratio.twbx 2.5 MB