📚 View Lesson Summary & Study Guide
Main Learning Objective:
Understand how to identify means and extremes in proportions, perform cross-multiplication, and solve for variables using algebraic properties.
Key Takeaways:
- Proportions are equations stating that two ratios are equivalent.
- In a proportion written as a/b = c/d, b and c are the means, while a and d are the extremes.
- Cross-multiplying means and extremes creates an equation of cross-products to solve for an unknown variable.
- Equations with variable coefficients can be solved either by dividing both sides by the coefficient or by multiplying by its reciprocal using the Multiplication Property of Equality.