Finding the Fourth Proportional to 489,646,656.90, 734,469,985.35 and 378,681,776.10
Calculator
Solution
The fourth proportional to 489,646,656.90, 734,469,985.35 and 378,681,776.10 is: 568,022,664.15
Step by Step Solution
- Step 1: Write the proportion equation
489,646,656.90 : 734,469,985.35 = 378,681,776.10 : x - Step 2: Convert to fraction form
489,646,656.90/734,469,985.35 = 378,681,776.10/x - Step 3: Cross multiply
489,646,656.90x = 734,469,985.35 × 378,681,776.10 - Step 4: Simplify right side
489,646,656.90x = 278,130,398,544,479,008 - Step 5: Solve for x
x = 278,130,398,544,479,008/489,646,656.90 - Step 6: Final answer
x = 568,022,664.15
Related Problems
Find fourth proportional to 244,823,328.45, 367,234,992.68 and 189,340,888.05
Half scale
Find fourth proportional to 979,293,313.80, 1,468,939,970.70 and 757,363,552.20
Double scale
Find fourth proportional to 489,646,657.90, 734,469,986.85 and 378,681,777.10
Similar ratio
Find fourth proportional to 734,469,985.35, 1,101,704,978.03 and 568,022,664.15
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.