Finding the Fourth Proportional to 309,482.12, 427,161.30 and 188,690.02
Calculator
Solution
The fourth proportional to 309,482.12, 427,161.30 and 188,690.02 is: 260,438.55
Step by Step Solution
- Step 1: Write the proportion equation
309,482.12 : 427,161.30 = 188,690.02 : x - Step 2: Convert to fraction form
309,482.12/427,161.30 = 188,690.02/x - Step 3: Cross multiply
309,482.12x = 427,161.30 × 188,690.02 - Step 4: Simplify right side
309,482.12x = 80,601,074,240.23 - Step 5: Solve for x
x = 80,601,074,240.23/309,482.12 - Step 6: Final answer
x = 260,438.55
Related Problems
Find fourth proportional to 154,741.06, 213,580.65 and 94,345.01
Half scale
Find fourth proportional to 618,964.24, 854,322.60 and 377,380.04
Double scale
Find fourth proportional to 309,483.12, 427,162.68 and 188,691.02
Similar ratio
Find fourth proportional to 464,223.18, 640,741.95 and 283,035.03
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.