Finding the Fourth Proportional to 806,423.80, 1,209,635.70 and 413,207.80
Calculator
Solution
The fourth proportional to 806,423.80, 1,209,635.70 and 413,207.80 is: 619,811.70
Step by Step Solution
- Step 1: Write the proportion equation
806,423.80 : 1,209,635.70 = 413,207.80 : x - Step 2: Convert to fraction form
806,423.80/1,209,635.70 = 413,207.80/x - Step 3: Cross multiply
806,423.80x = 1,209,635.70 × 413,207.80 - Step 4: Simplify right side
806,423.80x = 499,830,906,398.46 - Step 5: Solve for x
x = 499,830,906,398.46/806,423.80 - Step 6: Final answer
x = 619,811.70
Related Problems
Find fourth proportional to 403,211.90, 604,817.85 and 206,603.90
Half scale
Find fourth proportional to 1,612,847.60, 2,419,271.40 and 826,415.60
Double scale
Find fourth proportional to 806,424.80, 1,209,637.20 and 413,208.80
Similar ratio
Find fourth proportional to 1,209,635.70, 1,814,453.55 and 619,811.70
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.