Finding the Fourth Proportional to 284.25, 392.45 and 221.99
Calculator
Solution
The fourth proportional to 284.25, 392.45 and 221.99 is: 306.48
Step by Step Solution
- Step 1: Write the proportion equation
284.25 : 392.45 = 221.99 : x - Step 2: Convert to fraction form
284.25/392.45 = 221.99/x - Step 3: Cross multiply
284.25x = 392.45 × 221.99 - Step 4: Simplify right side
284.25x = 87,116.90 - Step 5: Solve for x
x = 87,116.90/284.25 - Step 6: Final answer
x = 306.48
Related Problems
Find fourth proportional to 142.13, 196.22 and 110.99
Half scale
Find fourth proportional to 568.51, 784.89 and 443.97
Double scale
Find fourth proportional to 285.25, 393.83 and 222.99
Similar ratio
Find fourth proportional to 426.38, 588.67 and 332.98
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.