Finding the Fourth Proportional to 318.76, 439.84 and 178.84
Calculator
Solution
The fourth proportional to 318.76, 439.84 and 178.84 is: 246.77
Step by Step Solution
- Step 1: Write the proportion equation
318.76 : 439.84 = 178.84 : x - Step 2: Convert to fraction form
318.76/439.84 = 178.84/x - Step 3: Cross multiply
318.76x = 439.84 × 178.84 - Step 4: Simplify right side
318.76x = 78,660.99 - Step 5: Solve for x
x = 78,660.99/318.76 - Step 6: Final answer
x = 246.77
Related Problems
Find fourth proportional to 159.38, 219.92 and 89.42
Half scale
Find fourth proportional to 637.52, 879.68 and 357.68
Double scale
Find fourth proportional to 319.76, 441.22 and 179.84
Similar ratio
Find fourth proportional to 478.14, 659.76 and 268.26
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.