Finding the Fourth Proportional to 281.44, 421.84 and 212.74
Calculator
Solution
The fourth proportional to 281.44, 421.84 and 212.74 is: 318.87
Step by Step Solution
- Step 1: Write the proportion equation
281.44 : 421.84 = 212.74 : x - Step 2: Convert to fraction form
281.44/421.84 = 212.74/x - Step 3: Cross multiply
281.44x = 421.84 × 212.74 - Step 4: Simplify right side
281.44x = 89,742.24 - Step 5: Solve for x
x = 89,742.24/281.44 - Step 6: Final answer
x = 318.87
Related Problems
Find fourth proportional to 140.72, 210.92 and 106.37
Half scale
Find fourth proportional to 562.88, 843.68 and 425.48
Double scale
Find fourth proportional to 282.44, 423.34 and 213.74
Similar ratio
Find fourth proportional to 422.16, 632.76 and 319.11
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.