Finding the Fourth Proportional to 478.94, 660.84 and 329.68
Calculator
Solution
The fourth proportional to 478.94, 660.84 and 329.68 is: 454.88
Step by Step Solution
- Step 1: Write the proportion equation
478.94 : 660.84 = 329.68 : x - Step 2: Convert to fraction form
478.94/660.84 = 329.68/x - Step 3: Cross multiply
478.94x = 660.84 × 329.68 - Step 4: Simplify right side
478.94x = 217,862.84 - Step 5: Solve for x
x = 217,862.84/478.94 - Step 6: Final answer
x = 454.88
Related Problems
Find fourth proportional to 239.47, 330.42 and 164.84
Half scale
Find fourth proportional to 957.89, 1,321.67 and 659.36
Double scale
Find fourth proportional to 479.94, 662.22 and 330.68
Similar ratio
Find fourth proportional to 718.41, 991.25 and 494.52
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.