Finding the Fourth Proportional to 259,813.20, 389,719.80 and 207,325.20
Calculator
Solution
The fourth proportional to 259,813.20, 389,719.80 and 207,325.20 is: 310,987.80
Step by Step Solution
- Step 1: Write the proportion equation
259,813.20 : 389,719.80 = 207,325.20 : x - Step 2: Convert to fraction form
259,813.20/389,719.80 = 207,325.20/x - Step 3: Cross multiply
259,813.20x = 389,719.80 × 207,325.20 - Step 4: Simplify right side
259,813.20x = 80,798,735,478.96 - Step 5: Solve for x
x = 80,798,735,478.96/259,813.20 - Step 6: Final answer
x = 310,987.80
Related Problems
Find fourth proportional to 129,906.60, 194,859.90 and 103,662.60
Half scale
Find fourth proportional to 519,626.40, 779,439.60 and 414,650.40
Double scale
Find fourth proportional to 259,814.20, 389,721.30 and 207,326.20
Similar ratio
Find fourth proportional to 389,719.80, 584,579.70 and 310,987.80
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.