Finding the Fourth Proportional to 258.99, 387.29 and 193.23
Calculator
Solution
The fourth proportional to 258.99, 387.29 and 193.23 is: 288.95
Step by Step Solution
- Step 1: Write the proportion equation
258.99 : 387.29 = 193.23 : x - Step 2: Convert to fraction form
258.99/387.29 = 193.23/x - Step 3: Cross multiply
258.99x = 387.29 × 193.23 - Step 4: Simplify right side
258.99x = 74,835.08 - Step 5: Solve for x
x = 74,835.08/258.99 - Step 6: Final answer
x = 288.95
Related Problems
Find fourth proportional to 129.50, 193.64 and 96.62
Half scale
Find fourth proportional to 517.98, 774.57 and 386.46
Double scale
Find fourth proportional to 259.99, 388.78 and 194.23
Similar ratio
Find fourth proportional to 388.49, 580.93 and 289.85
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.