Finding the Fourth Proportional to 680.63, 1,020.95 and 193.68
Calculator
Solution
The fourth proportional to 680.63, 1,020.95 and 193.68 is: 290.52
Step by Step Solution
- Step 1: Write the proportion equation
680.63 : 1,020.95 = 193.68 : x - Step 2: Convert to fraction form
680.63/1,020.95 = 193.68/x - Step 3: Cross multiply
680.63x = 1,020.95 × 193.68 - Step 4: Simplify right side
680.63x = 197,736.63 - Step 5: Solve for x
x = 197,736.63/680.63 - Step 6: Final answer
x = 290.52
Related Problems
Find fourth proportional to 340.31, 510.47 and 96.84
Half scale
Find fourth proportional to 1,361.25, 2,041.89 and 387.36
Double scale
Find fourth proportional to 681.63, 1,022.45 and 194.68
Similar ratio
Find fourth proportional to 1,020.94, 1,531.42 and 290.52
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.