Finding the Fourth Proportional to 202.79, 304.19 and 81.09
Calculator
Solution
The fourth proportional to 202.79, 304.19 and 81.09 is: 121.64
Step by Step Solution
- Step 1: Write the proportion equation
202.79 : 304.19 = 81.09 : x - Step 2: Convert to fraction form
202.79/304.19 = 81.09/x - Step 3: Cross multiply
202.79x = 304.19 × 81.09 - Step 4: Simplify right side
202.79x = 24,666.36 - Step 5: Solve for x
x = 24,666.36/202.79 - Step 6: Final answer
x = 121.64
Related Problems
Find fourth proportional to 101.39, 152.09 and 40.55
Half scale
Find fourth proportional to 405.57, 608.37 and 162.18
Double scale
Find fourth proportional to 203.79, 305.69 and 82.09
Similar ratio
Find fourth proportional to 304.18, 456.28 and 121.64
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.