Finding the Fourth Proportional to 879.91, 1,214.19 and 506.96
Calculator
Solution
The fourth proportional to 879.91, 1,214.19 and 506.96 is: 699.55
Step by Step Solution
- Step 1: Write the proportion equation
879.91 : 1,214.19 = 506.96 : x - Step 2: Convert to fraction form
879.91/1,214.19 = 506.96/x - Step 3: Cross multiply
879.91x = 1,214.19 × 506.96 - Step 4: Simplify right side
879.91x = 615,544.24 - Step 5: Solve for x
x = 615,544.24/879.91 - Step 6: Final answer
x = 699.55
Related Problems
Find fourth proportional to 439.96, 607.10 and 253.48
Half scale
Find fourth proportional to 1,759.83, 2,428.38 and 1,013.92
Double scale
Find fourth proportional to 880.91, 1,215.57 and 507.96
Similar ratio
Find fourth proportional to 1,319.87, 1,821.29 and 760.44
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.