Finding the Fourth Proportional to 870,988.21, 1,201,932.75 and 489,031.09
Calculator
Solution
The fourth proportional to 870,988.21, 1,201,932.75 and 489,031.09 is: 674,845.51
Step by Step Solution
- Step 1: Write the proportion equation
870,988.21 : 1,201,932.75 = 489,031.09 : x - Step 2: Convert to fraction form
870,988.21/1,201,932.75 = 489,031.09/x - Step 3: Cross multiply
870,988.21x = 1,201,932.75 × 489,031.09 - Step 4: Simplify right side
870,988.21x = 587,782,482,839.20 - Step 5: Solve for x
x = 587,782,482,839.20/870,988.21 - Step 6: Final answer
x = 674,845.51
Related Problems
Find fourth proportional to 435,494.11, 600,966.38 and 244,515.55
Half scale
Find fourth proportional to 1,741,976.42, 2,403,865.50 and 978,062.18
Double scale
Find fourth proportional to 870,989.21, 1,201,934.13 and 489,032.09
Similar ratio
Find fourth proportional to 1,306,482.32, 1,802,899.13 and 733,546.64
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.