Finding the Fourth Proportional to 56.70, 84.91 and 30.99
Calculator
Solution
The fourth proportional to 56.70, 84.91 and 30.99 is: 46.41
Step by Step Solution
- Step 1: Write the proportion equation
56.70 : 84.91 = 30.99 : x - Step 2: Convert to fraction form
56.70/84.91 = 30.99/x - Step 3: Cross multiply
56.70x = 84.91 × 30.99 - Step 4: Simplify right side
56.70x = 2,631.44 - Step 5: Solve for x
x = 2,631.44/56.70 - Step 6: Final answer
x = 46.41
Related Problems
Find fourth proportional to 28.35, 42.46 and 15.50
Half scale
Find fourth proportional to 113.39, 169.83 and 61.98
Double scale
Find fourth proportional to 57.70, 86.41 and 31.99
Similar ratio
Find fourth proportional to 85.04, 127.37 and 46.49
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.