Final answer:
The question involves triangle similarity and proportion, but lacks sufficient context or detail for a precise solution. The information given appears to be fragmented or possibly miscommunicated, and not directly applicable to any standard geometry problem on similar triangles.
Step-by-step explanation:
The student has provided a question which seems to involve the concept of similarity of triangles (denoted as ≈) and proportions. However, the information given is fragmented and lacks context, making it difficult to provide an accurate solution to the student's question as written. It appears as though there might be a typo or miscommunication regarding the values given for BE and CE in triangle DBE, as they are repeated with different values without additional context. The formula and other extracts provided do not appear to be directly related to solving a problem about similar triangles. In geometry, when two triangles are similar (e.g., △ABC ≈ △DBE), corresponding sides are proportional, but we need more details about the specific lengths or ratios in question here.