Finding the Fourth Proportional to 423.26, 634.97 and 149.28
Calculator
Solution
The fourth proportional to 423.26, 634.97 and 149.28 is: 223.95
Step by Step Solution
- Step 1: Write the proportion equation
423.26 : 634.97 = 149.28 : x - Step 2: Convert to fraction form
423.26/634.97 = 149.28/x - Step 3: Cross multiply
423.26x = 634.97 × 149.28 - Step 4: Simplify right side
423.26x = 94,788.32 - Step 5: Solve for x
x = 94,788.32/423.26 - Step 6: Final answer
x = 223.95
Related Problems
Find fourth proportional to 211.63, 317.49 and 74.64
Half scale
Find fourth proportional to 846.52, 1,269.94 and 298.56
Double scale
Find fourth proportional to 424.26, 636.47 and 150.28
Similar ratio
Find fourth proportional to 634.89, 952.46 and 223.92
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.