Finding the Fourth Proportional to 344.19, 515.69 and 289.69
Calculator
Solution
The fourth proportional to 344.19, 515.69 and 289.69 is: 434.03
Step by Step Solution
- Step 1: Write the proportion equation
344.19 : 515.69 = 289.69 : x - Step 2: Convert to fraction form
344.19/515.69 = 289.69/x - Step 3: Cross multiply
344.19x = 515.69 × 289.69 - Step 4: Simplify right side
344.19x = 149,390.24 - Step 5: Solve for x
x = 149,390.24/344.19 - Step 6: Final answer
x = 434.03
Related Problems
Find fourth proportional to 172.10, 257.85 and 144.85
Half scale
Find fourth proportional to 688.38, 1,031.38 and 579.38
Double scale
Find fourth proportional to 345.19, 517.19 and 290.69
Similar ratio
Find fourth proportional to 516.29, 773.54 and 434.54
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.