How to use the altitude of similar triangles to find the missing length

The video tutorial explains the concept of triangle proportions, focusing on the relationship between altitudes and side lengths. It demonstrates how to solve for unknown variables using these proportions, emphasizing the importance of maintaining consistent proportions across triangles. The tutorial includes a step-by-step guide on cross multiplication and calculations to find the value of X, highlighting potential pitfalls and strategies for solving similar problems.

How do you solve for X in the proportion given in the text?

What caution does the teacher provide regarding solving problems with proportions?