Finding the Fourth Proportional to 409.86, 614.91 and 135.99
Calculator
Solution
The fourth proportional to 409.86, 614.91 and 135.99 is: 204.02
Step by Step Solution
- Step 1: Write the proportion equation
409.86 : 614.91 = 135.99 : x - Step 2: Convert to fraction form
409.86/614.91 = 135.99/x - Step 3: Cross multiply
409.86x = 614.91 × 135.99 - Step 4: Simplify right side
409.86x = 83,621.61 - Step 5: Solve for x
x = 83,621.61/409.86 - Step 6: Final answer
x = 204.02
Related Problems
Find fourth proportional to 204.93, 307.46 and 68.00
Half scale
Find fourth proportional to 819.72, 1,229.82 and 271.98
Double scale
Find fourth proportional to 410.86, 616.41 and 136.99
Similar ratio
Find fourth proportional to 614.79, 922.37 and 203.99
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.