Finding the Fourth Proportional to 339.40, 508.99 and 122.93
Calculator
Solution
The fourth proportional to 339.40, 508.99 and 122.93 is: 184.36
Step by Step Solution
- Step 1: Write the proportion equation
339.40 : 508.99 = 122.93 : x - Step 2: Convert to fraction form
339.40/508.99 = 122.93/x - Step 3: Cross multiply
339.40x = 508.99 × 122.93 - Step 4: Simplify right side
339.40x = 62,570.14 - Step 5: Solve for x
x = 62,570.14/339.40 - Step 6: Final answer
x = 184.36
Related Problems
Find fourth proportional to 169.70, 254.50 and 61.47
Half scale
Find fourth proportional to 678.80, 1,017.98 and 245.86
Double scale
Find fourth proportional to 340.40, 510.49 and 123.93
Similar ratio
Find fourth proportional to 509.10, 763.49 and 184.40
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.