Finding the Fourth Proportional to 317.99, 476.99 and 171.85
Calculator
Solution
The fourth proportional to 317.99, 476.99 and 171.85 is: 257.78
Step by Step Solution
- Step 1: Write the proportion equation
317.99 : 476.99 = 171.85 : x - Step 2: Convert to fraction form
317.99/476.99 = 171.85/x - Step 3: Cross multiply
317.99x = 476.99 × 171.85 - Step 4: Simplify right side
317.99x = 81,970.22 - Step 5: Solve for x
x = 81,970.22/317.99 - Step 6: Final answer
x = 257.78
Related Problems
Find fourth proportional to 158.99, 238.49 and 85.92
Half scale
Find fourth proportional to 635.97, 953.98 and 343.70
Double scale
Find fourth proportional to 318.99, 478.49 and 172.85
Similar ratio
Find fourth proportional to 476.98, 715.48 and 257.77
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.