Finding the Fourth Proportional to 355.19, 533.09 and 138.92
Calculator
Solution
The fourth proportional to 355.19, 533.09 and 138.92 is: 208.50
Step by Step Solution
- Step 1: Write the proportion equation
355.19 : 533.09 = 138.92 : x - Step 2: Convert to fraction form
355.19/533.09 = 138.92/x - Step 3: Cross multiply
355.19x = 533.09 × 138.92 - Step 4: Simplify right side
355.19x = 74,054.84 - Step 5: Solve for x
x = 74,054.84/355.19 - Step 6: Final answer
x = 208.50
Related Problems
Find fourth proportional to 177.59, 266.54 and 69.46
Half scale
Find fourth proportional to 710.38, 1,066.17 and 277.84
Double scale
Find fourth proportional to 356.19, 534.59 and 139.92
Similar ratio
Find fourth proportional to 532.78, 799.63 and 208.38
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.