Finding the Third Proportional to 381 and 457.50
Calculator
Solution
The third proportional to 381 and 457.50 is: 549.36
Step by Step Solution
- Step 1: Write the proportion equation
381 : 457.50 = 457.50 : x - Step 2: Convert to fraction form
381/457.50 = 457.50/x - Step 3: Cross multiply
381x = 457.50 × 457.50 - Step 4: Simplify right side
381x = 209,306.25 - Step 5: Solve for x
x = 209,306.25/381 - Step 6: Final answer
x = 549.36
Related Problems
Find third proportional to 190.50 and 228.75
Half scale
Find third proportional to 762 and 915
Double scale
Find third proportional to 383 and 460
Similar ratio
Find third proportional to 571.50 and 686.25
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.