Finding the Fourth Proportional to 345.93, 518.99 and 140.64
Calculator
Solution
The fourth proportional to 345.93, 518.99 and 140.64 is: 211.00
Step by Step Solution
- Step 1: Write the proportion equation
345.93 : 518.99 = 140.64 : x - Step 2: Convert to fraction form
345.93/518.99 = 140.64/x - Step 3: Cross multiply
345.93x = 518.99 × 140.64 - Step 4: Simplify right side
345.93x = 72,990.05 - Step 5: Solve for x
x = 72,990.05/345.93 - Step 6: Final answer
x = 211.00
Related Problems
Find fourth proportional to 172.96, 259.49 and 70.32
Half scale
Find fourth proportional to 691.85, 1,037.97 and 281.28
Double scale
Find fourth proportional to 346.93, 520.49 and 141.64
Similar ratio
Find fourth proportional to 518.89, 778.48 and 210.96
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.