Finding the Fourth Proportional to 890,390.40, 1,228,731.84 and 487,981.44
Calculator
Solution
The fourth proportional to 890,390.40, 1,228,731.84 and 487,981.44 is: 673,410.60
Step by Step Solution
- Step 1: Write the proportion equation
890,390.40 : 1,228,731.84 = 487,981.44 : x - Step 2: Convert to fraction form
890,390.40/1,228,731.84 = 487,981.44/x - Step 3: Cross multiply
890,390.40x = 1,228,731.84 × 487,981.44 - Step 4: Simplify right side
890,390.40x = 599,598,332,657.05 - Step 5: Solve for x
x = 599,598,332,657.05/890,390.40 - Step 6: Final answer
x = 673,410.60
Related Problems
Find fourth proportional to 445,195.20, 614,365.92 and 243,990.72
Half scale
Find fourth proportional to 1,780,780.80, 2,457,463.68 and 975,962.88
Double scale
Find fourth proportional to 890,391.40, 1,228,733.22 and 487,982.44
Similar ratio
Find fourth proportional to 1,335,585.60, 1,843,097.76 and 731,972.16
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.