Finding the Fourth Proportional to 280,564.21, 387,178.59 and 153,240.09
Calculator
Solution
The fourth proportional to 280,564.21, 387,178.59 and 153,240.09 is: 211,471.31
Step by Step Solution
- Step 1: Write the proportion equation
280,564.21 : 387,178.59 = 153,240.09 : x - Step 2: Convert to fraction form
280,564.21/387,178.59 = 153,240.09/x - Step 3: Cross multiply
280,564.21x = 387,178.59 × 153,240.09 - Step 4: Simplify right side
280,564.21x = 59,331,281,977.67 - Step 5: Solve for x
x = 59,331,281,977.67/280,564.21 - Step 6: Final answer
x = 211,471.31
Related Problems
Find fourth proportional to 140,282.11, 193,589.30 and 76,620.05
Half scale
Find fourth proportional to 561,128.42, 774,357.18 and 306,480.18
Double scale
Find fourth proportional to 280,565.21, 387,179.97 and 153,241.09
Similar ratio
Find fourth proportional to 420,846.32, 580,767.89 and 229,860.14
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.