Finding the Fourth Proportional to 425,624.97, 638,530.86 and 126,128.99
Calculator
Solution
The fourth proportional to 425,624.97, 638,530.86 and 126,128.99 is: 189,221.16
Step by Step Solution
- Step 1: Write the proportion equation
425,624.97 : 638,530.86 = 126,128.99 : x - Step 2: Convert to fraction form
425,624.97/638,530.86 = 126,128.99/x - Step 3: Cross multiply
425,624.97x = 638,530.86 × 126,128.99 - Step 4: Simplify right side
425,624.97x = 80,537,252,455.63 - Step 5: Solve for x
x = 80,537,252,455.63/425,624.97 - Step 6: Final answer
x = 189,221.16
Related Problems
Find fourth proportional to 212,812.49, 319,265.43 and 63,064.50
Half scale
Find fourth proportional to 851,249.94, 1,277,061.72 and 252,257.98
Double scale
Find fourth proportional to 425,625.97, 638,532.36 and 126,129.99
Similar ratio
Find fourth proportional to 638,437.46, 957,796.29 and 189,193.49
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.