Finding the Fourth Proportional to 858,128.49, 1,287,400.77 and 259,053.84
Calculator
Solution
The fourth proportional to 858,128.49, 1,287,400.77 and 259,053.84 is: 388,643.56
Step by Step Solution
- Step 1: Write the proportion equation
858,128.49 : 1,287,400.77 = 259,053.84 : x - Step 2: Convert to fraction form
858,128.49/1,287,400.77 = 259,053.84/x - Step 3: Cross multiply
858,128.49x = 1,287,400.77 × 259,053.84 - Step 4: Simplify right side
858,128.49x = 333,506,113,087.46 - Step 5: Solve for x
x = 333,506,113,087.46/858,128.49 - Step 6: Final answer
x = 388,643.56
Related Problems
Find fourth proportional to 429,064.25, 643,700.39 and 129,526.92
Half scale
Find fourth proportional to 1,716,256.98, 2,574,801.54 and 518,107.68
Double scale
Find fourth proportional to 858,129.49, 1,287,402.27 and 259,054.84
Similar ratio
Find fourth proportional to 1,287,192.74, 1,931,101.16 and 388,580.76
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.