Finding the Third Proportional to 628 and 1,570
Calculator
Solution
The third proportional to 628 and 1,570 is: 3,925
Step by Step Solution
- Step 1: Write the proportion equation
628 : 1,570 = 1,570 : x - Step 2: Convert to fraction form
628/1,570 = 1,570/x - Step 3: Cross multiply
628x = 1,570 × 1,570 - Step 4: Simplify right side
628x = 2,464,900 - Step 5: Solve for x
x = 2,464,900/628 - Step 6: Final answer
x = 3,925
Related Problems
Find third proportional to 314 and 785
Half scale
Find third proportional to 1,256 and 3,140
Double scale
Find third proportional to 630 and 1,575
Similar ratio
Find third proportional to 942 and 2,355
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.