Finding the Fourth Proportional to 45.63, 68.42 and 28.52
Calculator
Solution
The fourth proportional to 45.63, 68.42 and 28.52 is: 42.75
Step by Step Solution
- Step 1: Write the proportion equation
45.63 : 68.42 = 28.52 : x - Step 2: Convert to fraction form
45.63/68.42 = 28.52/x - Step 3: Cross multiply
45.63x = 68.42 × 28.52 - Step 4: Simplify right side
45.63x = 1,950.85 - Step 5: Solve for x
x = 1,950.85/45.63 - Step 6: Final answer
x = 42.75
Related Problems
Find fourth proportional to 22.82, 34.21 and 14.26
Half scale
Find fourth proportional to 91.26, 136.83 and 57.03
Double scale
Find fourth proportional to 46.63, 69.91 and 29.52
Similar ratio
Find fourth proportional to 68.45, 102.62 and 42.77
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.