Finding the Fourth Proportional to 805,008.78, 1,207,658.97 and 331,435.80
Calculator
Solution
The fourth proportional to 805,008.78, 1,207,658.97 and 331,435.80 is: 497,213.73
Step by Step Solution
- Step 1: Write the proportion equation
805,008.78 : 1,207,658.97 = 331,435.80 : x - Step 2: Convert to fraction form
805,008.78/1,207,658.97 = 331,435.80/x - Step 3: Cross multiply
805,008.78x = 1,207,658.97 × 331,435.80 - Step 4: Simplify right side
805,008.78x = 400,261,416,849.13 - Step 5: Solve for x
x = 400,261,416,849.13/805,008.78 - Step 6: Final answer
x = 497,213.73
Related Problems
Find fourth proportional to 402,504.39, 603,829.49 and 165,717.90
Half scale
Find fourth proportional to 1,610,017.56, 2,415,317.94 and 662,871.60
Double scale
Find fourth proportional to 805,009.78, 1,207,660.47 and 331,436.80
Similar ratio
Find fourth proportional to 1,207,513.17, 1,811,488.46 and 497,153.70
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.