Finding the Fourth Proportional to 412.80, 618.99 and 169.19
Calculator
Solution
The fourth proportional to 412.80, 618.99 and 169.19 is: 253.70
Step by Step Solution
- Step 1: Write the proportion equation
412.80 : 618.99 = 169.19 : x - Step 2: Convert to fraction form
412.80/618.99 = 169.19/x - Step 3: Cross multiply
412.80x = 618.99 × 169.19 - Step 4: Simplify right side
412.80x = 104,726.92 - Step 5: Solve for x
x = 104,726.92/412.80 - Step 6: Final answer
x = 253.70
Related Problems
Find fourth proportional to 206.40, 309.50 and 84.60
Half scale
Find fourth proportional to 825.59, 1,237.98 and 338.38
Double scale
Find fourth proportional to 413.80, 620.49 and 170.19
Similar ratio
Find fourth proportional to 619.19, 928.49 and 253.79
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.