Finding the Fourth Proportional to 320.70, 480.91 and 115.23
Calculator
Solution
The fourth proportional to 320.70, 480.91 and 115.23 is: 172.79
Step by Step Solution
- Step 1: Write the proportion equation
320.70 : 480.91 = 115.23 : x - Step 2: Convert to fraction form
320.70/480.91 = 115.23/x - Step 3: Cross multiply
320.70x = 480.91 × 115.23 - Step 4: Simplify right side
320.70x = 55,415.26 - Step 5: Solve for x
x = 55,415.26/320.70 - Step 6: Final answer
x = 172.79
Related Problems
Find fourth proportional to 160.35, 240.46 and 57.62
Half scale
Find fourth proportional to 641.40, 961.82 and 230.46
Double scale
Find fourth proportional to 321.70, 482.41 and 116.23
Similar ratio
Find fourth proportional to 481.05, 721.37 and 172.85
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.