Finding the Fourth Proportional to 287,765.85, 431,648.10 and 77,403.99
Calculator
Solution
The fourth proportional to 287,765.85, 431,648.10 and 77,403.99 is: 116,105.80
Step by Step Solution
- Step 1: Write the proportion equation
287,765.85 : 431,648.10 = 77,403.99 : x - Step 2: Convert to fraction form
287,765.85/431,648.10 = 77,403.99/x - Step 3: Cross multiply
287,765.85x = 431,648.10 × 77,403.99 - Step 4: Simplify right side
287,765.85x = 33,411,285,215.92 - Step 5: Solve for x
x = 33,411,285,215.92/287,765.85 - Step 6: Final answer
x = 116,105.80
Related Problems
Find fourth proportional to 143,882.93, 215,824.05 and 38,702.00
Half scale
Find fourth proportional to 575,531.70, 863,296.20 and 154,807.98
Double scale
Find fourth proportional to 287,766.85, 431,649.60 and 77,404.99
Similar ratio
Find fourth proportional to 431,648.78, 647,472.15 and 116,105.99
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.