Finding the Fourth Proportional to 220.70, 331.19 and 218.99
Calculator
Solution
The fourth proportional to 220.70, 331.19 and 218.99 is: 328.62
Step by Step Solution
- Step 1: Write the proportion equation
220.70 : 331.19 = 218.99 : x - Step 2: Convert to fraction form
220.70/331.19 = 218.99/x - Step 3: Cross multiply
220.70x = 331.19 × 218.99 - Step 4: Simplify right side
220.70x = 72,525.64 - Step 5: Solve for x
x = 72,525.64/220.70 - Step 6: Final answer
x = 328.62
Related Problems
Find fourth proportional to 110.35, 165.60 and 109.49
Half scale
Find fourth proportional to 441.39, 662.38 and 437.97
Double scale
Find fourth proportional to 221.70, 332.69 and 219.99
Similar ratio
Find fourth proportional to 331.04, 496.79 and 328.48
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.