Finding the Fourth Proportional to 811,201.12, 1,215,943.62 and 305,543.31
Calculator
Solution
The fourth proportional to 811,201.12, 1,215,943.62 and 305,543.31 is: 457,991.77
Step by Step Solution
- Step 1: Write the proportion equation
811,201.12 : 1,215,943.62 = 305,543.31 : x - Step 2: Convert to fraction form
811,201.12/1,215,943.62 = 305,543.31/x - Step 3: Cross multiply
811,201.12x = 1,215,943.62 × 305,543.31 - Step 4: Simplify right side
811,201.12x = 371,523,438,428.18 - Step 5: Solve for x
x = 371,523,438,428.18/811,201.12 - Step 6: Final answer
x = 457,991.77
Related Problems
Find fourth proportional to 405,600.56, 607,971.81 and 152,771.66
Half scale
Find fourth proportional to 1,622,402.24, 2,431,887.24 and 611,086.62
Double scale
Find fourth proportional to 811,202.12, 1,215,945.12 and 305,544.31
Similar ratio
Find fourth proportional to 1,216,801.68, 1,823,915.43 and 458,314.97
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.