Finding the Fourth Proportional to 417.82, 626.79 and 143.98
Calculator
Solution
The fourth proportional to 417.82, 626.79 and 143.98 is: 215.99
Step by Step Solution
- Step 1: Write the proportion equation
417.82 : 626.79 = 143.98 : x - Step 2: Convert to fraction form
417.82/626.79 = 143.98/x - Step 3: Cross multiply
417.82x = 626.79 × 143.98 - Step 4: Simplify right side
417.82x = 90,245.22 - Step 5: Solve for x
x = 90,245.22/417.82 - Step 6: Final answer
x = 215.99
Related Problems
Find fourth proportional to 208.91, 313.40 and 71.99
Half scale
Find fourth proportional to 835.64, 1,253.58 and 287.96
Double scale
Find fourth proportional to 418.82, 628.29 and 144.98
Similar ratio
Find fourth proportional to 626.73, 940.19 and 215.97
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.