Finding the Fourth Proportional to 405.06, 558.99 and 239.40
Calculator
Solution
The fourth proportional to 405.06, 558.99 and 239.40 is: 330.38
Step by Step Solution
- Step 1: Write the proportion equation
405.06 : 558.99 = 239.40 : x - Step 2: Convert to fraction form
405.06/558.99 = 239.40/x - Step 3: Cross multiply
405.06x = 558.99 × 239.40 - Step 4: Simplify right side
405.06x = 133,822.21 - Step 5: Solve for x
x = 133,822.21/405.06 - Step 6: Final answer
x = 330.38
Related Problems
Find fourth proportional to 202.53, 279.50 and 119.70
Half scale
Find fourth proportional to 810.12, 1,117.98 and 478.80
Double scale
Find fourth proportional to 406.06, 560.37 and 240.40
Similar ratio
Find fourth proportional to 607.59, 838.49 and 359.10
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.