Finding the Fourth Proportional to 285.09, 393.43 and 201.19
Calculator
Solution
The fourth proportional to 285.09, 393.43 and 201.19 is: 277.65
Step by Step Solution
- Step 1: Write the proportion equation
285.09 : 393.43 = 201.19 : x - Step 2: Convert to fraction form
285.09/393.43 = 201.19/x - Step 3: Cross multiply
285.09x = 393.43 × 201.19 - Step 4: Simplify right side
285.09x = 79,154.18 - Step 5: Solve for x
x = 79,154.18/285.09 - Step 6: Final answer
x = 277.65
Related Problems
Find fourth proportional to 142.55, 196.72 and 100.60
Half scale
Find fourth proportional to 570.18, 786.86 and 402.38
Double scale
Find fourth proportional to 286.09, 394.81 and 202.19
Similar ratio
Find fourth proportional to 427.64, 590.15 and 301.79
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.