Finding the Fourth Proportional to 276.91, 415.36 and 84.53
Calculator
Solution
The fourth proportional to 276.91, 415.36 and 84.53 is: 126.79
Step by Step Solution
- Step 1: Write the proportion equation
276.91 : 415.36 = 84.53 : x - Step 2: Convert to fraction form
276.91/415.36 = 84.53/x - Step 3: Cross multiply
276.91x = 415.36 × 84.53 - Step 4: Simplify right side
276.91x = 35,110.38 - Step 5: Solve for x
x = 35,110.38/276.91 - Step 6: Final answer
x = 126.79
Related Problems
Find fourth proportional to 138.46, 207.68 and 42.27
Half scale
Find fourth proportional to 553.82, 830.72 and 169.06
Double scale
Find fourth proportional to 277.91, 416.86 and 85.53
Similar ratio
Find fourth proportional to 415.37, 623.04 and 126.80
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.