Finding the Fourth Proportional to 745,389.68, 1,028,640.24 and 405,860
Calculator
Solution
The fourth proportional to 745,389.68, 1,028,640.24 and 405,860 is: 560,088.15
Step by Step Solution
- Step 1: Write the proportion equation
745,389.68 : 1,028,640.24 = 405,860 : x - Step 2: Convert to fraction form
745,389.68/1,028,640.24 = 405,860/x - Step 3: Cross multiply
745,389.68x = 1,028,640.24 × 405,860 - Step 4: Simplify right side
745,389.68x = 417,483,927,806.40 - Step 5: Solve for x
x = 417,483,927,806.40/745,389.68 - Step 6: Final answer
x = 560,088.15
Related Problems
Find fourth proportional to 372,694.84, 514,320.12 and 202,930
Half scale
Find fourth proportional to 1,490,779.36, 2,057,280.48 and 811,720
Double scale
Find fourth proportional to 745,390.68, 1,028,641.62 and 405,861
Similar ratio
Find fourth proportional to 1,118,084.52, 1,542,960.36 and 608,790
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.