Finding the Fourth Proportional to 415.55, 623.32 and 126.99
Calculator
Solution
The fourth proportional to 415.55, 623.32 and 126.99 is: 190.48
Step by Step Solution
- Step 1: Write the proportion equation
415.55 : 623.32 = 126.99 : x - Step 2: Convert to fraction form
415.55/623.32 = 126.99/x - Step 3: Cross multiply
415.55x = 623.32 × 126.99 - Step 4: Simplify right side
415.55x = 79,153.87 - Step 5: Solve for x
x = 79,153.87/415.55 - Step 6: Final answer
x = 190.48
Related Problems
Find fourth proportional to 207.77, 311.66 and 63.49
Half scale
Find fourth proportional to 831.10, 1,246.64 and 253.97
Double scale
Find fourth proportional to 416.55, 624.82 and 127.99
Similar ratio
Find fourth proportional to 623.32, 934.98 and 190.48
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.