Finding the Fourth Proportional to 450.18, 675.09 and 387.99
Calculator
Solution
The fourth proportional to 450.18, 675.09 and 387.99 is: 581.83
Step by Step Solution
- Step 1: Write the proportion equation
450.18 : 675.09 = 387.99 : x - Step 2: Convert to fraction form
450.18/675.09 = 387.99/x - Step 3: Cross multiply
450.18x = 675.09 × 387.99 - Step 4: Simplify right side
450.18x = 261,928.17 - Step 5: Solve for x
x = 261,928.17/450.18 - Step 6: Final answer
x = 581.83
Related Problems
Find fourth proportional to 225.09, 337.55 and 194.00
Half scale
Find fourth proportional to 900.36, 1,350.18 and 775.98
Double scale
Find fourth proportional to 451.18, 676.59 and 388.99
Similar ratio
Find fourth proportional to 675.27, 1,012.64 and 581.99
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.