Finding the Fourth Proportional to 457.35, 684.99 and 447.09
Calculator
Solution
The fourth proportional to 457.35, 684.99 and 447.09 is: 669.62
Step by Step Solution
- Step 1: Write the proportion equation
457.35 : 684.99 = 447.09 : x - Step 2: Convert to fraction form
457.35/684.99 = 447.09/x - Step 3: Cross multiply
457.35x = 684.99 × 447.09 - Step 4: Simplify right side
457.35x = 306,252.18 - Step 5: Solve for x
x = 306,252.18/457.35 - Step 6: Final answer
x = 669.62
Related Problems
Find fourth proportional to 228.68, 342.50 and 223.55
Half scale
Find fourth proportional to 914.70, 1,369.98 and 894.18
Double scale
Find fourth proportional to 458.35, 686.49 and 448.09
Similar ratio
Find fourth proportional to 686.03, 1,027.49 and 670.64
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.