Finding the Fourth Proportional to 407,568,138.80, 611,352,208.20 and 134,938,905.80
Calculator
Solution
The fourth proportional to 407,568,138.80, 611,352,208.20 and 134,938,905.80 is: 202,408,358.70
Step by Step Solution
- Step 1: Write the proportion equation
407,568,138.80 : 611,352,208.20 = 134,938,905.80 : x - Step 2: Convert to fraction form
407,568,138.80/611,352,208.20 = 134,938,905.80/x - Step 3: Cross multiply
407,568,138.80x = 611,352,208.20 × 134,938,905.80 - Step 4: Simplify right side
407,568,138.80x = 82,495,198,032,921,808 - Step 5: Solve for x
x = 82,495,198,032,921,808/407,568,138.80 - Step 6: Final answer
x = 202,408,358.70
Related Problems
Find fourth proportional to 203,784,069.40, 305,676,104.10 and 67,469,452.90
Half scale
Find fourth proportional to 815,136,277.60, 1,222,704,416.40 and 269,877,811.60
Double scale
Find fourth proportional to 407,568,139.80, 611,352,209.70 and 134,938,906.80
Similar ratio
Find fourth proportional to 611,352,208.20, 917,028,312.30 and 202,408,358.70
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.