Finding the Fourth Proportional to 393,997.74, 543,729.84 and 221,918.92
Calculator
Solution
The fourth proportional to 393,997.74, 543,729.84 and 221,918.92 is: 306,255.41
Step by Step Solution
- Step 1: Write the proportion equation
393,997.74 : 543,729.84 = 221,918.92 : x - Step 2: Convert to fraction form
393,997.74/543,729.84 = 221,918.92/x - Step 3: Cross multiply
393,997.74x = 543,729.84 × 221,918.92 - Step 4: Simplify right side
393,997.74x = 120,663,938,864.57 - Step 5: Solve for x
x = 120,663,938,864.57/393,997.74 - Step 6: Final answer
x = 306,255.41
Related Problems
Find fourth proportional to 196,998.87, 271,864.92 and 110,959.46
Half scale
Find fourth proportional to 787,995.48, 1,087,459.68 and 443,837.84
Double scale
Find fourth proportional to 393,998.74, 543,731.22 and 221,919.92
Similar ratio
Find fourth proportional to 590,996.61, 815,594.76 and 332,878.38
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.