Final answer:
To find the missing actual dimension, use the scale ratio provided and set up a proportion.
Step-by-step explanation:
To find the missing actual dimension, we can use the scale ratio given. The scale ratio is 1:5, which means that for every 1 unit on the model, there are 5 units in actual size. In this case, the model dimension is 3ft. To find the actual dimension, we can set up a proportion:
- Model Dimension / Actual Dimension = Scale Ratio
- 3ft / Actual Dimension = 1 / 5
- Cross-multiply and solve for the Actual Dimension
By cross-multiplying, we get: 3ft * 5 = Actual Dimension * 1. This simplifies to: 15ft = Actual Dimension. Therefore, the missing dimension in actual size is 15ft.