Finding the Fourth Proportional to 389.62, 537.68 and 214.96
Calculator
Solution
The fourth proportional to 389.62, 537.68 and 214.96 is: 296.65
Step by Step Solution
- Step 1: Write the proportion equation
389.62 : 537.68 = 214.96 : x - Step 2: Convert to fraction form
389.62/537.68 = 214.96/x - Step 3: Cross multiply
389.62x = 537.68 × 214.96 - Step 4: Simplify right side
389.62x = 115,578.62 - Step 5: Solve for x
x = 115,578.62/389.62 - Step 6: Final answer
x = 296.65
Related Problems
Find fourth proportional to 194.81, 268.84 and 107.48
Half scale
Find fourth proportional to 779.23, 1,075.35 and 429.92
Double scale
Find fourth proportional to 390.62, 539.06 and 215.96
Similar ratio
Find fourth proportional to 584.42, 806.51 and 322.44
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.