Ratios and Scale Factor
Presentation
•
Mathematics
•
7th Grade
•
Hard
Joseph Anderson
FREE Resource
8 Slides • 3 Questions
1
scale and scale factor
2
Scale drawings and models
To solve scale problems, use a proportion!
3
Set up a Scale proportion
write the word ratio of units
make the first ratio the scale
put the numbers from the problem in the appropriate place in the proportion
4
5
Multiple Choice
A scale drawing has a scale of 1cm:2ft. What is the actual width of a pool if it is 6cm on the drawing?
3ft
6ft
12ft
6
To find the scale
write the word ratio
put 1 over x for the scale ratio
put the numbers from the word problem in the second ratio
solve the proportion algebraically
7
8
Multiple Choice
A model ship is 30cm long and the actual ship is 150m long. What is the scale?
1cm:5m
1cm:3m
1cm:50m
1cm:150m
9
To find the scale factor
use conversions to write the scale with matching units (use a proportion)
the scale factor is the ratio written without units
10
11
Multiple Choice
The scale in an advertisement is 1in:6ft. What is the scale factor?
1:72
1:6
1:36
1:12
scale and scale factor
Show answer
Auto Play
Slide 1 / 11
SLIDE
Similar Resources on Wayground
7 questions
Dot Plots
Presentation
•
7th Grade
8 questions
Mean Absolute Deviation
Presentation
•
6th - 7th Grade
7 questions
Rational number operations word problems
Presentation
•
7th Grade
8 questions
Gr7 Constant of Proportionality
Presentation
•
7th Grade
10 questions
Finding Slope
Presentation
•
7th - 8th Grade
11 questions
Probability Independent and Dependent Events
Presentation
•
7th Grade
11 questions
Proportional Scale Drawings
Presentation
•
7th Grade
9 questions
EXPONENTS AND POWERS
Presentation
•
7th Grade
Popular Resources on Wayground
10 questions
Safety Day 2026 – Student Review
Quiz
•
9th Grade
21 questions
Continents and Oceans
Quiz
•
6th Grade
20 questions
Parts of Speech
Quiz
•
5th Grade
16 questions
Subject & Predicate
Quiz
•
5th Grade
25 questions
Multiplication Facts
Quiz
•
5th Grade
12 questions
Map Skills
Quiz
•
3rd Grade
22 questions
Continents and Oceans
Quiz
•
5th Grade
15 questions
Rounding Decimals
Quiz
•
5th Grade
Discover more resources for Mathematics
16 questions
Proportional and Non Proportional Relationships in Tables, Graphs, and Equations
Quiz
•
7th Grade
20 questions
Constant of Proportionality
Quiz
•
7th Grade
20 questions
Halloween Trivia
Quiz
•
7th Grade
15 questions
One-Step Equations
Quiz
•
7th Grade
20 questions
Add and Subtract Integers
Quiz
•
6th - 8th Grade
16 questions
Adding and Subtracting Integers
Quiz
•
7th Grade
20 questions
Two-Step Equations Review
Quiz
•
7th Grade
20 questions
Model Algebraic expressions with tiles
Quiz
•
7th Grade