Finding the Fourth Proportional to 259.22, 387.99 and 214.26
Calculator
Solution
The fourth proportional to 259.22, 387.99 and 214.26 is: 320.70
Step by Step Solution
- Step 1: Write the proportion equation
259.22 : 387.99 = 214.26 : x - Step 2: Convert to fraction form
259.22/387.99 = 214.26/x - Step 3: Cross multiply
259.22x = 387.99 × 214.26 - Step 4: Simplify right side
259.22x = 83,130.74 - Step 5: Solve for x
x = 83,130.74/259.22 - Step 6: Final answer
x = 320.70
Related Problems
Find fourth proportional to 129.61, 194.00 and 107.13
Half scale
Find fourth proportional to 518.44, 775.98 and 428.52
Double scale
Find fourth proportional to 260.22, 389.49 and 215.26
Similar ratio
Find fourth proportional to 388.83, 581.99 and 321.39
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.