Finding the Fourth Proportional to 748,721.20, 1,122,425.70 and 449,320.90
Calculator
Solution
The fourth proportional to 748,721.20, 1,122,425.70 and 449,320.90 is: 673,587.61
Step by Step Solution
- Step 1: Write the proportion equation
748,721.20 : 1,122,425.70 = 449,320.90 : x - Step 2: Convert to fraction form
748,721.20/1,122,425.70 = 449,320.90/x - Step 3: Cross multiply
748,721.20x = 1,122,425.70 × 449,320.90 - Step 4: Simplify right side
748,721.20x = 504,329,325,707.13 - Step 5: Solve for x
x = 504,329,325,707.13/748,721.20 - Step 6: Final answer
x = 673,587.61
Related Problems
Find fourth proportional to 374,360.60, 561,212.85 and 224,660.45
Half scale
Find fourth proportional to 1,497,442.40, 2,244,851.40 and 898,641.80
Double scale
Find fourth proportional to 748,722.20, 1,122,427.20 and 449,321.90
Similar ratio
Find fourth proportional to 1,123,081.80, 1,683,638.55 and 673,981.35
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.