Finding the Fourth Proportional to 639,326.20, 957,299.70 and 512,375.80
Calculator
Solution
The fourth proportional to 639,326.20, 957,299.70 and 512,375.80 is: 767,209.60
Step by Step Solution
- Step 1: Write the proportion equation
639,326.20 : 957,299.70 = 512,375.80 : x - Step 2: Convert to fraction form
639,326.20/957,299.70 = 512,375.80/x - Step 3: Cross multiply
639,326.20x = 957,299.70 × 512,375.80 - Step 4: Simplify right side
639,326.20x = 490,497,199,627.26 - Step 5: Solve for x
x = 490,497,199,627.26/639,326.20 - Step 6: Final answer
x = 767,209.60
Related Problems
Find fourth proportional to 319,663.10, 478,649.85 and 256,187.90
Half scale
Find fourth proportional to 1,278,652.40, 1,914,599.40 and 1,024,751.60
Double scale
Find fourth proportional to 639,327.20, 957,301.20 and 512,376.80
Similar ratio
Find fourth proportional to 958,989.30, 1,435,949.55 and 768,563.70
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.