Finding the Fourth Proportional to 301.47, 452.61 and 139.20
Calculator
Solution
The fourth proportional to 301.47, 452.61 and 139.20 is: 208.99
Step by Step Solution
- Step 1: Write the proportion equation
301.47 : 452.61 = 139.20 : x - Step 2: Convert to fraction form
301.47/452.61 = 139.20/x - Step 3: Cross multiply
301.47x = 452.61 × 139.20 - Step 4: Simplify right side
301.47x = 63,003.31 - Step 5: Solve for x
x = 63,003.31/301.47 - Step 6: Final answer
x = 208.99
Related Problems
Find fourth proportional to 150.74, 226.31 and 69.60
Half scale
Find fourth proportional to 602.94, 905.22 and 278.40
Double scale
Find fourth proportional to 302.47, 454.11 and 140.20
Similar ratio
Find fourth proportional to 452.21, 678.92 and 208.80
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.