Final answer:
Increasing grid ratios or scale factors means that a greater actual size is represented by each unit of measurement on a scale model or drawing. This is instrumental in calculating true sizes from scaled representations.
Step-by-step explanation:
Increasing grid ratios refer to altering the scale factor in scale drawings or models. A scale factor is a ratio that compares the dimensions of a scale model or drawing to its actual size. For example, a scale of 1/200 means that one unit on the drawing is equivalent to 200 units in real life. The scale factor here is crucial for determining scale dimensions or actual dimensions.
To find actual dimensions using the scale factor, one would set up a proportion where the scale ratio is set equal to the ratio of the model's dimensions to the actual object's dimensions. When the scale ratio increases, it indicates that each unit of measurement on the model or drawing represents a larger actual dimension. This can help accurately calculate real-world measurements for various applications, such as in architecture, engineering, or mapmaking.