Finding the Fourth Proportional to 905.74, 1,358.26 and 385.99
Calculator
Solution
The fourth proportional to 905.74, 1,358.26 and 385.99 is: 578.83
Step by Step Solution
- Step 1: Write the proportion equation
905.74 : 1,358.26 = 385.99 : x - Step 2: Convert to fraction form
905.74/1,358.26 = 385.99/x - Step 3: Cross multiply
905.74x = 1,358.26 × 385.99 - Step 4: Simplify right side
905.74x = 524,267.99 - Step 5: Solve for x
x = 524,267.99/905.74 - Step 6: Final answer
x = 578.83
Related Problems
Find fourth proportional to 452.87, 679.13 and 192.99
Half scale
Find fourth proportional to 1,811.48, 2,716.52 and 771.97
Double scale
Find fourth proportional to 906.74, 1,359.76 and 386.99
Similar ratio
Find fourth proportional to 1,358.61, 2,037.39 and 578.98
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.