Finding the Third Proportional to 374 and 428
Calculator
Solution
The third proportional to 374 and 428 is: 489.80
Step by Step Solution
- Step 1: Write the proportion equation
374 : 428 = 428 : x - Step 2: Convert to fraction form
374/428 = 428/x - Step 3: Cross multiply
374x = 428 × 428 - Step 4: Simplify right side
374x = 183,184 - Step 5: Solve for x
x = 183,184/374 - Step 6: Final answer
x = 489.80
Related Problems
Find third proportional to 187 and 214
Half scale
Find third proportional to 748 and 856
Double scale
Find third proportional to 376 and 430
Similar ratio
Find third proportional to 561 and 642
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.