Finding the Fourth Proportional to 769,823,999.20, 1,154,735,998.80 and 425,450,231.20
Calculator
Solution
The fourth proportional to 769,823,999.20, 1,154,735,998.80 and 425,450,231.20 is: 638,175,346.80
Step by Step Solution
- Step 1: Write the proportion equation
769,823,999.20 : 1,154,735,998.80 = 425,450,231.20 : x - Step 2: Convert to fraction form
769,823,999.20/1,154,735,998.80 = 425,450,231.20/x - Step 3: Cross multiply
769,823,999.20x = 1,154,735,998.80 × 425,450,231.20 - Step 4: Simplify right side
769,823,999.20x = 491,282,697,664,422,912 - Step 5: Solve for x
x = 491,282,697,664,422,912/769,823,999.20 - Step 6: Final answer
x = 638,175,346.80
Related Problems
Find fourth proportional to 384,911,999.60, 577,367,999.40 and 212,725,115.60
Half scale
Find fourth proportional to 1,539,647,998.40, 2,309,471,997.60 and 850,900,462.40
Double scale
Find fourth proportional to 769,824,000.20, 1,154,736,000.30 and 425,450,232.20
Similar ratio
Find fourth proportional to 1,154,735,998.80, 1,732,103,998.20 and 638,175,346.80
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.