Finding the Fourth Proportional to 985,493.80, 1,478,240.70 and 320,645.80
Calculator
Solution
The fourth proportional to 985,493.80, 1,478,240.70 and 320,645.80 is: 480,968.70
Step by Step Solution
- Step 1: Write the proportion equation
985,493.80 : 1,478,240.70 = 320,645.80 : x - Step 2: Convert to fraction form
985,493.80/1,478,240.70 = 320,645.80/x - Step 3: Cross multiply
985,493.80x = 1,478,240.70 × 320,645.80 - Step 4: Simplify right side
985,493.80x = 473,991,671,844.06 - Step 5: Solve for x
x = 473,991,671,844.06/985,493.80 - Step 6: Final answer
x = 480,968.70
Related Problems
Find fourth proportional to 492,746.90, 739,120.35 and 160,322.90
Half scale
Find fourth proportional to 1,970,987.60, 2,956,481.40 and 641,291.60
Double scale
Find fourth proportional to 985,494.80, 1,478,242.20 and 320,646.80
Similar ratio
Find fourth proportional to 1,478,240.70, 2,217,361.05 and 480,968.70
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.