Finding the Fourth Proportional to 1,202.74, 1,804 and 381
Calculator
Solution
The fourth proportional to 1,202.74, 1,804 and 381 is: 571.47
Step by Step Solution
- Step 1: Write the proportion equation
1,202.74 : 1,804 = 381 : x - Step 2: Convert to fraction form
1,202.74/1,804 = 381/x - Step 3: Cross multiply
1,202.74x = 1,804 × 381 - Step 4: Simplify right side
1,202.74x = 687,324 - Step 5: Solve for x
x = 687,324/1,202.74 - Step 6: Final answer
x = 571.47
Related Problems
Find fourth proportional to 601.37, 902 and 190.50
Half scale
Find fourth proportional to 2,405.48, 3,608 and 762
Double scale
Find fourth proportional to 1,203.74, 1,805.50 and 382
Similar ratio
Find fourth proportional to 1,804.11, 2,706 and 571.50
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.