Ratio, Proportion & Scale
When two quantities have to move together.
M051Foundation
Ratios
a concrete mixer on a bridge repair with one bag of cement left
Bridge scalerEnter mission M052FoundationProportions
a water pump costed by the hour for a drought response
Bridge scalerEnter mission M057FoundationScale drawings
an evacuation floor plan being redrawn for a school wall
Bridge scalerEnter mission M058FoundationSimilar shapes
a replacement sail being cut from a photograph of the original
Bridge scalerEnter mission M063ExplorerGolden ratio
a museum frame being cut to the proportions of the painting inside
Area plannerEnter mission M087FoundationReading a map scale
a trekking group planning a day walk from a paper map
Coordinate navigatorEnter mission M092ExplorerSimple interest
a cooperative bank quoting a smallholder on a seasonal loan
Coordinate navigatorEnter mission M103ExplorerScale models
an engineering fair building a scale model of a river bridge
Area plannerEnter mission