Finding the Fourth Proportional to 286.99, 430.13 and 132.70
Calculator
Solution
The fourth proportional to 286.99, 430.13 and 132.70 is: 198.89
Step by Step Solution
- Step 1: Write the proportion equation
286.99 : 430.13 = 132.70 : x - Step 2: Convert to fraction form
286.99/430.13 = 132.70/x - Step 3: Cross multiply
286.99x = 430.13 × 132.70 - Step 4: Simplify right side
286.99x = 57,078.25 - Step 5: Solve for x
x = 57,078.25/286.99 - Step 6: Final answer
x = 198.89
Related Problems
Find fourth proportional to 143.50, 215.07 and 66.35
Half scale
Find fourth proportional to 573.98, 860.26 and 265.40
Double scale
Find fourth proportional to 287.99, 431.63 and 133.70
Similar ratio
Find fourth proportional to 430.49, 645.20 and 199.05
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.