Finding the Fourth Proportional to 381.99, 573.20 and 186.99
Calculator
Solution
The fourth proportional to 381.99, 573.20 and 186.99 is: 280.59
Step by Step Solution
- Step 1: Write the proportion equation
381.99 : 573.20 = 186.99 : x - Step 2: Convert to fraction form
381.99/573.20 = 186.99/x - Step 3: Cross multiply
381.99x = 573.20 × 186.99 - Step 4: Simplify right side
381.99x = 107,182.67 - Step 5: Solve for x
x = 107,182.67/381.99 - Step 6: Final answer
x = 280.59
Related Problems
Find fourth proportional to 191.00, 286.60 and 93.50
Half scale
Find fourth proportional to 763.98, 1,146.40 and 373.98
Double scale
Find fourth proportional to 382.99, 574.70 and 187.99
Similar ratio
Find fourth proportional to 572.99, 859.80 and 280.49
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.