Finding the Fourth Proportional to 620,403.05, 855,938.18 and 405,668.81
Calculator
Solution
The fourth proportional to 620,403.05, 855,938.18 and 405,668.81 is: 559,680.39
Step by Step Solution
- Step 1: Write the proportion equation
620,403.05 : 855,938.18 = 405,668.81 : x - Step 2: Convert to fraction form
620,403.05/855,938.18 = 405,668.81/x - Step 3: Cross multiply
620,403.05x = 855,938.18 × 405,668.81 - Step 4: Simplify right side
620,403.05x = 347,227,418,634.48 - Step 5: Solve for x
x = 347,227,418,634.48/620,403.05 - Step 6: Final answer
x = 559,680.39
Related Problems
Find fourth proportional to 310,201.52, 427,969.09 and 202,834.40
Half scale
Find fourth proportional to 1,240,806.09, 1,711,876.36 and 811,337.61
Double scale
Find fourth proportional to 620,404.05, 855,939.56 and 405,669.81
Similar ratio
Find fourth proportional to 930,604.57, 1,283,907.27 and 608,503.21
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.