Finding the Fourth Proportional to 520,211.80, 780,317.70 and 489,107.80
Calculator
Solution
The fourth proportional to 520,211.80, 780,317.70 and 489,107.80 is: 733,661.70
Step by Step Solution
- Step 1: Write the proportion equation
520,211.80 : 780,317.70 = 489,107.80 : x - Step 2: Convert to fraction form
520,211.80/780,317.70 = 489,107.80/x - Step 3: Cross multiply
520,211.80x = 780,317.70 × 489,107.80 - Step 4: Simplify right side
520,211.80x = 381,659,473,548.06 - Step 5: Solve for x
x = 381,659,473,548.06/520,211.80 - Step 6: Final answer
x = 733,661.70
Related Problems
Find fourth proportional to 260,105.90, 390,158.85 and 244,553.90
Half scale
Find fourth proportional to 1,040,423.60, 1,560,635.40 and 978,215.60
Double scale
Find fourth proportional to 520,212.80, 780,319.20 and 489,108.80
Similar ratio
Find fourth proportional to 780,317.70, 1,170,476.55 and 733,661.70
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.