Finding the Fourth Proportional to 344.46, 516.90 and 138.99
Calculator
Solution
The fourth proportional to 344.46, 516.90 and 138.99 is: 208.57
Step by Step Solution
- Step 1: Write the proportion equation
344.46 : 516.90 = 138.99 : x - Step 2: Convert to fraction form
344.46/516.90 = 138.99/x - Step 3: Cross multiply
344.46x = 516.90 × 138.99 - Step 4: Simplify right side
344.46x = 71,843.93 - Step 5: Solve for x
x = 71,843.93/344.46 - Step 6: Final answer
x = 208.57
Related Problems
Find fourth proportional to 172.23, 258.45 and 69.50
Half scale
Find fourth proportional to 688.92, 1,033.80 and 277.98
Double scale
Find fourth proportional to 345.46, 518.40 and 139.99
Similar ratio
Find fourth proportional to 516.69, 775.35 and 208.49
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.