Finding the Fourth Proportional to 247.29, 370.91 and 84.97
Calculator
Solution
The fourth proportional to 247.29, 370.91 and 84.97 is: 127.45
Step by Step Solution
- Step 1: Write the proportion equation
247.29 : 370.91 = 84.97 : x - Step 2: Convert to fraction form
247.29/370.91 = 84.97/x - Step 3: Cross multiply
247.29x = 370.91 × 84.97 - Step 4: Simplify right side
247.29x = 31,516.22 - Step 5: Solve for x
x = 31,516.22/247.29 - Step 6: Final answer
x = 127.45
Related Problems
Find fourth proportional to 123.65, 185.46 and 42.49
Half scale
Find fourth proportional to 494.58, 741.82 and 169.94
Double scale
Find fourth proportional to 248.29, 372.41 and 85.97
Similar ratio
Find fourth proportional to 370.94, 556.37 and 127.46
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.