Finding the Fourth Proportional to 216.23, 324.35 and 79.31
Calculator
Solution
The fourth proportional to 216.23, 324.35 and 79.31 is: 118.96
Step by Step Solution
- Step 1: Write the proportion equation
216.23 : 324.35 = 79.31 : x - Step 2: Convert to fraction form
216.23/324.35 = 79.31/x - Step 3: Cross multiply
216.23x = 324.35 × 79.31 - Step 4: Simplify right side
216.23x = 25,722.18 - Step 5: Solve for x
x = 25,722.18/216.23 - Step 6: Final answer
x = 118.96
Related Problems
Find fourth proportional to 108.11, 162.17 and 39.65
Half scale
Find fourth proportional to 432.45, 648.69 and 158.61
Double scale
Find fourth proportional to 217.23, 325.85 and 80.31
Similar ratio
Find fourth proportional to 324.34, 486.52 and 118.96
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.