Finding the Fourth Proportional to 720,855.60, 994,728.36 and 398,569.68
Calculator
Solution
The fourth proportional to 720,855.60, 994,728.36 and 398,569.68 is: 549,997.20
Step by Step Solution
- Step 1: Write the proportion equation
720,855.60 : 994,728.36 = 398,569.68 : x - Step 2: Convert to fraction form
720,855.60/994,728.36 = 398,569.68/x - Step 3: Cross multiply
720,855.60x = 994,728.36 × 398,569.68 - Step 4: Simplify right side
720,855.60x = 396,468,564,132.13 - Step 5: Solve for x
x = 396,468,564,132.13/720,855.60 - Step 6: Final answer
x = 549,997.20
Related Problems
Find fourth proportional to 360,427.80, 497,364.18 and 199,284.84
Half scale
Find fourth proportional to 1,441,711.20, 1,989,456.72 and 797,139.36
Double scale
Find fourth proportional to 720,856.60, 994,729.74 and 398,570.68
Similar ratio
Find fourth proportional to 1,081,283.40, 1,492,092.54 and 597,854.52
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.