Finding the Fourth Proportional to 378.65, 520.99 and 369.91
Calculator
Solution
The fourth proportional to 378.65, 520.99 and 369.91 is: 508.96
Step by Step Solution
- Step 1: Write the proportion equation
378.65 : 520.99 = 369.91 : x - Step 2: Convert to fraction form
378.65/520.99 = 369.91/x - Step 3: Cross multiply
378.65x = 520.99 × 369.91 - Step 4: Simplify right side
378.65x = 192,717.18 - Step 5: Solve for x
x = 192,717.18/378.65 - Step 6: Final answer
x = 508.96
Related Problems
Find fourth proportional to 189.33, 260.49 and 184.95
Half scale
Find fourth proportional to 757.31, 1,041.98 and 739.82
Double scale
Find fourth proportional to 379.65, 522.36 and 370.91
Similar ratio
Find fourth proportional to 567.98, 781.48 and 554.86
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.