Finding the Fourth Proportional to 189.21, 283.64 and 97.70
Calculator
Solution
The fourth proportional to 189.21, 283.64 and 97.70 is: 146.46
Step by Step Solution
- Step 1: Write the proportion equation
189.21 : 283.64 = 97.70 : x - Step 2: Convert to fraction form
189.21/283.64 = 97.70/x - Step 3: Cross multiply
189.21x = 283.64 × 97.70 - Step 4: Simplify right side
189.21x = 27,711.63 - Step 5: Solve for x
x = 27,711.63/189.21 - Step 6: Final answer
x = 146.46
Related Problems
Find fourth proportional to 94.61, 141.82 and 48.85
Half scale
Find fourth proportional to 378.42, 567.28 and 195.40
Double scale
Find fourth proportional to 190.21, 285.14 and 98.70
Similar ratio
Find fourth proportional to 283.82, 425.46 and 146.55
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.