Finding the Fourth Proportional to 415.19, 621.54 and 276.23
Calculator
Solution
The fourth proportional to 415.19, 621.54 and 276.23 is: 413.52
Step by Step Solution
- Step 1: Write the proportion equation
415.19 : 621.54 = 276.23 : x - Step 2: Convert to fraction form
415.19/621.54 = 276.23/x - Step 3: Cross multiply
415.19x = 621.54 × 276.23 - Step 4: Simplify right side
415.19x = 171,687.99 - Step 5: Solve for x
x = 171,687.99/415.19 - Step 6: Final answer
x = 413.52
Related Problems
Find fourth proportional to 207.60, 310.77 and 138.12
Half scale
Find fourth proportional to 830.38, 1,243.08 and 552.46
Double scale
Find fourth proportional to 416.19, 623.04 and 277.23
Similar ratio
Find fourth proportional to 622.79, 932.31 and 414.35
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.