Finding the Fourth Proportional to 505,215.25, 697,197.11 and 278,860.81
Calculator
Solution
The fourth proportional to 505,215.25, 697,197.11 and 278,860.81 is: 384,827.95
Step by Step Solution
- Step 1: Write the proportion equation
505,215.25 : 697,197.11 = 278,860.81 : x - Step 2: Convert to fraction form
505,215.25/697,197.11 = 278,860.81/x - Step 3: Cross multiply
505,215.25x = 697,197.11 × 278,860.81 - Step 4: Simplify right side
505,215.25x = 194,420,950,824.26 - Step 5: Solve for x
x = 194,420,950,824.26/505,215.25 - Step 6: Final answer
x = 384,827.95
Related Problems
Find fourth proportional to 252,607.63, 348,598.56 and 139,430.41
Half scale
Find fourth proportional to 1,010,430.50, 1,394,394.22 and 557,721.62
Double scale
Find fourth proportional to 505,216.25, 697,198.49 and 278,861.81
Similar ratio
Find fourth proportional to 757,822.88, 1,045,795.67 and 418,291.22
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.