Finding the Fourth Proportional to 781,278.21, 1,177,773.15 and 729,198.03
Calculator
Solution
The fourth proportional to 781,278.21, 1,177,773.15 and 729,198.03 is: 1,099,262.53
Step by Step Solution
- Step 1: Write the proportion equation
781,278.21 : 1,177,773.15 = 729,198.03 : x - Step 2: Convert to fraction form
781,278.21/1,177,773.15 = 729,198.03/x - Step 3: Cross multiply
781,278.21x = 1,177,773.15 × 729,198.03 - Step 4: Simplify right side
781,278.21x = 858,829,857,874.95 - Step 5: Solve for x
x = 858,829,857,874.95/781,278.21 - Step 6: Final answer
x = 1,099,262.53
Related Problems
Find fourth proportional to 390,639.10, 588,886.57 and 364,599.01
Half scale
Find fourth proportional to 1,562,556.41, 2,355,546.30 and 1,458,396.06
Double scale
Find fourth proportional to 781,279.21, 1,177,774.66 and 729,199.03
Similar ratio
Find fourth proportional to 1,171,917.31, 1,766,659.72 and 1,093,797.04
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.