Finding the Fourth Proportional to 65.86, 90.84 and 43.99
Calculator
Solution
The fourth proportional to 65.86, 90.84 and 43.99 is: 60.67
Step by Step Solution
- Step 1: Write the proportion equation
65.86 : 90.84 = 43.99 : x - Step 2: Convert to fraction form
65.86/90.84 = 43.99/x - Step 3: Cross multiply
65.86x = 90.84 × 43.99 - Step 4: Simplify right side
65.86x = 3,996.05 - Step 5: Solve for x
x = 3,996.05/65.86 - Step 6: Final answer
x = 60.67
Related Problems
Find fourth proportional to 32.93, 45.42 and 22.00
Half scale
Find fourth proportional to 131.72, 181.68 and 87.98
Double scale
Find fourth proportional to 66.86, 92.22 and 44.99
Similar ratio
Find fourth proportional to 98.79, 136.26 and 65.99
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.