Finding the Fourth Proportional to 356.36, 491.79 and 199
Calculator
Solution
The fourth proportional to 356.36, 491.79 and 199 is: 274.63
Step by Step Solution
- Step 1: Write the proportion equation
356.36 : 491.79 = 199 : x - Step 2: Convert to fraction form
356.36/491.79 = 199/x - Step 3: Cross multiply
356.36x = 491.79 × 199 - Step 4: Simplify right side
356.36x = 97,866.21 - Step 5: Solve for x
x = 97,866.21/356.36 - Step 6: Final answer
x = 274.63
Related Problems
Find fourth proportional to 178.18, 245.90 and 99.50
Half scale
Find fourth proportional to 712.72, 983.58 and 398
Double scale
Find fourth proportional to 357.36, 493.17 and 200
Similar ratio
Find fourth proportional to 534.54, 737.69 and 298.50
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.