Finding the Fourth Proportional to 239.81, 330.93 and 161.15
Calculator
Solution
The fourth proportional to 239.81, 330.93 and 161.15 is: 222.38
Step by Step Solution
- Step 1: Write the proportion equation
239.81 : 330.93 = 161.15 : x - Step 2: Convert to fraction form
239.81/330.93 = 161.15/x - Step 3: Cross multiply
239.81x = 330.93 × 161.15 - Step 4: Simplify right side
239.81x = 53,327.71 - Step 5: Solve for x
x = 53,327.71/239.81 - Step 6: Final answer
x = 222.38
Related Problems
Find fourth proportional to 119.90, 165.47 and 80.57
Half scale
Find fourth proportional to 479.61, 661.86 and 322.29
Double scale
Find fourth proportional to 240.81, 332.31 and 162.15
Similar ratio
Find fourth proportional to 359.71, 496.40 and 241.72
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.