Finding the Fourth Proportional to 278,305.07, 384,028.56 and 155,804.09
Calculator
Solution
The fourth proportional to 278,305.07, 384,028.56 and 155,804.09 is: 214,991.48
Step by Step Solution
- Step 1: Write the proportion equation
278,305.07 : 384,028.56 = 155,804.09 : x - Step 2: Convert to fraction form
278,305.07/384,028.56 = 155,804.09/x - Step 3: Cross multiply
278,305.07x = 384,028.56 × 155,804.09 - Step 4: Simplify right side
278,305.07x = 59,833,218,404.67 - Step 5: Solve for x
x = 59,833,218,404.67/278,305.07 - Step 6: Final answer
x = 214,991.48
Related Problems
Find fourth proportional to 139,152.53, 192,014.28 and 77,902.04
Half scale
Find fourth proportional to 556,610.13, 768,057.12 and 311,608.17
Double scale
Find fourth proportional to 278,306.07, 384,029.94 and 155,805.09
Similar ratio
Find fourth proportional to 417,457.60, 576,042.84 and 233,706.13
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.