Finding the Fourth Proportional to 290,948,497.20, 436,422,745.80 and 259,380,901.80
Calculator
Solution
The fourth proportional to 290,948,497.20, 436,422,745.80 and 259,380,901.80 is: 389,071,352.70
Step by Step Solution
- Step 1: Write the proportion equation
290,948,497.20 : 436,422,745.80 = 259,380,901.80 : x - Step 2: Convert to fraction form
290,948,497.20/436,422,745.80 = 259,380,901.80/x - Step 3: Cross multiply
290,948,497.20x = 436,422,745.80 × 259,380,901.80 - Step 4: Simplify right side
290,948,497.20x = 113,199,725,371,636,176 - Step 5: Solve for x
x = 113,199,725,371,636,176/290,948,497.20 - Step 6: Final answer
x = 389,071,352.70
Related Problems
Find fourth proportional to 145,474,248.60, 218,211,372.90 and 129,690,450.90
Half scale
Find fourth proportional to 581,896,994.40, 872,845,491.60 and 518,761,803.60
Double scale
Find fourth proportional to 290,948,498.20, 436,422,747.30 and 259,380,902.80
Similar ratio
Find fourth proportional to 436,422,745.80, 654,634,118.70 and 389,071,352.70
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.