Finding the Fourth Proportional to 287,386.65, 431,079.99 and 87,708.06
Calculator
Solution
The fourth proportional to 287,386.65, 431,079.99 and 87,708.06 is: 131,562.09
Step by Step Solution
- Step 1: Write the proportion equation
287,386.65 : 431,079.99 = 87,708.06 : x - Step 2: Convert to fraction form
287,386.65/431,079.99 = 87,708.06/x - Step 3: Cross multiply
287,386.65x = 431,079.99 × 87,708.06 - Step 4: Simplify right side
287,386.65x = 37,809,189,627.72 - Step 5: Solve for x
x = 37,809,189,627.72/287,386.65 - Step 6: Final answer
x = 131,562.09
Related Problems
Find fourth proportional to 143,693.33, 215,540.00 and 43,854.03
Half scale
Find fourth proportional to 574,773.30, 862,159.98 and 175,416.12
Double scale
Find fourth proportional to 287,387.65, 431,081.49 and 87,709.06
Similar ratio
Find fourth proportional to 431,079.98, 646,619.99 and 131,562.09
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.