Finding the Fourth Proportional to 407.18, 611.01 and 201.65
Calculator
Solution
The fourth proportional to 407.18, 611.01 and 201.65 is: 302.58
Step by Step Solution
- Step 1: Write the proportion equation
407.18 : 611.01 = 201.65 : x - Step 2: Convert to fraction form
407.18/611.01 = 201.65/x - Step 3: Cross multiply
407.18x = 611.01 × 201.65 - Step 4: Simplify right side
407.18x = 123,207.11 - Step 5: Solve for x
x = 123,207.11/407.18 - Step 6: Final answer
x = 302.58
Related Problems
Find fourth proportional to 203.59, 305.51 and 100.82
Half scale
Find fourth proportional to 814.37, 1,222.02 and 403.29
Double scale
Find fourth proportional to 408.18, 612.51 and 202.65
Similar ratio
Find fourth proportional to 610.77, 916.52 and 302.47
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.