Finding the Fourth Proportional to 402.99, 604.53 and 128.99
Calculator
Solution
The fourth proportional to 402.99, 604.53 and 128.99 is: 193.49
Step by Step Solution
- Step 1: Write the proportion equation
402.99 : 604.53 = 128.99 : x - Step 2: Convert to fraction form
402.99/604.53 = 128.99/x - Step 3: Cross multiply
402.99x = 604.53 × 128.99 - Step 4: Simplify right side
402.99x = 77,974.66 - Step 5: Solve for x
x = 77,974.66/402.99 - Step 6: Final answer
x = 193.49
Related Problems
Find fourth proportional to 201.50, 302.26 and 64.49
Half scale
Find fourth proportional to 805.98, 1,209.05 and 257.97
Double scale
Find fourth proportional to 403.99, 606.03 and 129.99
Similar ratio
Find fourth proportional to 604.49, 906.79 and 193.48
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.