Finding the Fourth Proportional to 638,396,778.09, 880,987,155.84 and 345,041,346.09
Calculator
Solution
The fourth proportional to 638,396,778.09, 880,987,155.84 and 345,041,346.09 is: 476,156,842.53
Step by Step Solution
- Step 1: Write the proportion equation
638,396,778.09 : 880,987,155.84 = 345,041,346.09 : x - Step 2: Convert to fraction form
638,396,778.09/880,987,155.84 = 345,041,346.09/x - Step 3: Cross multiply
638,396,778.09x = 880,987,155.84 × 345,041,346.09 - Step 4: Simplify right side
638,396,778.09x = 303,976,994,139,034,176 - Step 5: Solve for x
x = 303,976,994,139,034,176/638,396,778.09 - Step 6: Final answer
x = 476,156,842.53
Related Problems
Find fourth proportional to 319,198,389.05, 440,493,577.92 and 172,520,673.05
Half scale
Find fourth proportional to 1,276,793,556.18, 1,761,974,311.68 and 690,082,692.18
Double scale
Find fourth proportional to 638,396,779.09, 880,987,157.22 and 345,041,347.09
Similar ratio
Find fourth proportional to 957,595,167.14, 1,321,480,733.76 and 517,562,019.14
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.