Finding the Fourth Proportional to 354.36, 489 and 199.08
Calculator
Solution
The fourth proportional to 354.36, 489 and 199.08 is: 274.72
Step by Step Solution
- Step 1: Write the proportion equation
354.36 : 489 = 199.08 : x - Step 2: Convert to fraction form
354.36/489 = 199.08/x - Step 3: Cross multiply
354.36x = 489 × 199.08 - Step 4: Simplify right side
354.36x = 97,350.12 - Step 5: Solve for x
x = 97,350.12/354.36 - Step 6: Final answer
x = 274.72
Related Problems
Find fourth proportional to 177.18, 244.50 and 99.54
Half scale
Find fourth proportional to 708.72, 978 and 398.16
Double scale
Find fourth proportional to 355.36, 490.38 and 200.08
Similar ratio
Find fourth proportional to 531.54, 733.50 and 298.62
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.