Finding the Fourth Proportional to 342.55, 513.93 and 144.99
Calculator
Solution
The fourth proportional to 342.55, 513.93 and 144.99 is: 217.53
Step by Step Solution
- Step 1: Write the proportion equation
342.55 : 513.93 = 144.99 : x - Step 2: Convert to fraction form
342.55/513.93 = 144.99/x - Step 3: Cross multiply
342.55x = 513.93 × 144.99 - Step 4: Simplify right side
342.55x = 74,514.44 - Step 5: Solve for x
x = 74,514.44/342.55 - Step 6: Final answer
x = 217.53
Related Problems
Find fourth proportional to 171.28, 256.96 and 72.50
Half scale
Find fourth proportional to 685.10, 1,027.86 and 289.98
Double scale
Find fourth proportional to 343.55, 515.43 and 145.99
Similar ratio
Find fourth proportional to 513.83, 770.89 and 217.49
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.