Finding the Fourth Proportional to 408.99, 564.36 and 231.90
Calculator
Solution
The fourth proportional to 408.99, 564.36 and 231.90 is: 320.00
Step by Step Solution
- Step 1: Write the proportion equation
408.99 : 564.36 = 231.90 : x - Step 2: Convert to fraction form
408.99/564.36 = 231.90/x - Step 3: Cross multiply
408.99x = 564.36 × 231.90 - Step 4: Simplify right side
408.99x = 130,874.99 - Step 5: Solve for x
x = 130,874.99/408.99 - Step 6: Final answer
x = 320.00
Related Problems
Find fourth proportional to 204.49, 282.18 and 115.95
Half scale
Find fourth proportional to 817.97, 1,128.72 and 463.80
Double scale
Find fourth proportional to 409.99, 565.74 and 232.90
Similar ratio
Find fourth proportional to 613.48, 846.54 and 347.85
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.