比例

1. Origins, structure, and basic meaning

• Structure: 比例 is read as ひれい and means “proportion”.
• Basic usage: The examples show a relation between sales and customer numbers and the mathematical relation of circumference to diameter.

2. Common pitfalls and similar expressions

• Distinguishing senses and uses
  • The core pattern is AはBに比例する; with ほぼ, the relationship is approximate rather than mathematically exact.