Finding the Fourth Proportional to 861,941,489.49, 1,292,912,251.38 and 206,892,515.79
Calculator
Solution
The fourth proportional to 861,941,489.49, 1,292,912,251.38 and 206,892,515.79 is: 310,338,777.80
Step by Step Solution
- Step 1: Write the proportion equation
861,941,489.49 : 1,292,912,251.38 = 206,892,515.79 : x - Step 2: Convert to fraction form
861,941,489.49/1,292,912,251.38 = 206,892,515.79/x - Step 3: Cross multiply
861,941,489.49x = 1,292,912,251.38 × 206,892,515.79 - Step 4: Simplify right side
861,941,489.49x = 267,493,868,383,721,120 - Step 5: Solve for x
x = 267,493,868,383,721,120/861,941,489.49 - Step 6: Final answer
x = 310,338,777.80
Related Problems
Find fourth proportional to 430,970,744.75, 646,456,125.69 and 103,446,257.90
Half scale
Find fourth proportional to 1,723,882,978.98, 2,585,824,502.76 and 413,785,031.58
Double scale
Find fourth proportional to 861,941,490.49, 1,292,912,252.88 and 206,892,516.79
Similar ratio
Find fourth proportional to 1,292,912,234.24, 1,939,368,377.07 and 310,338,773.69
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.