Finding the Third Proportional to 2,940 and 4,200
Calculator
Solution
The third proportional to 2,940 and 4,200 is: 6,000
Step by Step Solution
- Step 1: Write the proportion equation
2,940 : 4,200 = 4,200 : x - Step 2: Convert to fraction form
2,940/4,200 = 4,200/x - Step 3: Cross multiply
2,940x = 4,200 × 4,200 - Step 4: Simplify right side
2,940x = 17,640,000 - Step 5: Solve for x
x = 17,640,000/2,940 - Step 6: Final answer
x = 6,000
Related Problems
Find third proportional to 1,470 and 2,100
Half scale
Find third proportional to 5,880 and 8,400
Double scale
Find third proportional to 2,942 and 4,203
Similar ratio
Find third proportional to 4,410 and 6,300
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.