Finding the Fourth Proportional to 395.64, 546 and 220.99
Calculator
Solution
The fourth proportional to 395.64, 546 and 220.99 is: 304.98
Step by Step Solution
- Step 1: Write the proportion equation
395.64 : 546 = 220.99 : x - Step 2: Convert to fraction form
395.64/546 = 220.99/x - Step 3: Cross multiply
395.64x = 546 × 220.99 - Step 4: Simplify right side
395.64x = 120,660.54 - Step 5: Solve for x
x = 120,660.54/395.64 - Step 6: Final answer
x = 304.98
Related Problems
Find fourth proportional to 197.82, 273 and 110.50
Half scale
Find fourth proportional to 791.28, 1,092 and 441.98
Double scale
Find fourth proportional to 396.64, 547.38 and 221.99
Similar ratio
Find fourth proportional to 593.46, 819 and 331.49
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.