Finding the Fourth Proportional to 412.11, 618.63 and 330.99
Calculator
Solution
The fourth proportional to 412.11, 618.63 and 330.99 is: 496.86
Step by Step Solution
- Step 1: Write the proportion equation
412.11 : 618.63 = 330.99 : x - Step 2: Convert to fraction form
412.11/618.63 = 330.99/x - Step 3: Cross multiply
412.11x = 618.63 × 330.99 - Step 4: Simplify right side
412.11x = 204,760.34 - Step 5: Solve for x
x = 204,760.34/412.11 - Step 6: Final answer
x = 496.86
Related Problems
Find fourth proportional to 206.06, 309.32 and 165.50
Half scale
Find fourth proportional to 824.22, 1,237.26 and 661.98
Double scale
Find fourth proportional to 413.11, 620.13 and 331.99
Similar ratio
Find fourth proportional to 618.17, 927.95 and 496.49
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.