Finding the Fourth Proportional to 314.42, 434.36 and 311.99
Calculator
Solution
The fourth proportional to 314.42, 434.36 and 311.99 is: 431.01
Step by Step Solution
- Step 1: Write the proportion equation
314.42 : 434.36 = 311.99 : x - Step 2: Convert to fraction form
314.42/434.36 = 311.99/x - Step 3: Cross multiply
314.42x = 434.36 × 311.99 - Step 4: Simplify right side
314.42x = 135,514.58 - Step 5: Solve for x
x = 135,514.58/314.42 - Step 6: Final answer
x = 431.01
Related Problems
Find fourth proportional to 157.21, 217.18 and 155.99
Half scale
Find fourth proportional to 628.83, 868.73 and 623.97
Double scale
Find fourth proportional to 315.42, 435.74 and 312.99
Similar ratio
Find fourth proportional to 471.62, 651.54 and 467.98
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.