Finding the Fourth Proportional to 683.71, 943.49 and 388.99
Calculator
Solution
The fourth proportional to 683.71, 943.49 and 388.99 is: 536.79
Step by Step Solution
- Step 1: Write the proportion equation
683.71 : 943.49 = 388.99 : x - Step 2: Convert to fraction form
683.71/943.49 = 388.99/x - Step 3: Cross multiply
683.71x = 943.49 × 388.99 - Step 4: Simplify right side
683.71x = 367,006.23 - Step 5: Solve for x
x = 367,006.23/683.71 - Step 6: Final answer
x = 536.79
Related Problems
Find fourth proportional to 341.86, 471.74 and 194.50
Half scale
Find fourth proportional to 1,367.42, 1,886.97 and 777.98
Double scale
Find fourth proportional to 684.71, 944.86 and 389.99
Similar ratio
Find fourth proportional to 1,025.57, 1,415.23 and 583.49
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.