Finding the Fourth Proportional to 265,639.42, 398,576.90 and 139,249.50
Calculator
Solution
The fourth proportional to 265,639.42, 398,576.90 and 139,249.50 is: 208,935.99
Step by Step Solution
- Step 1: Write the proportion equation
265,639.42 : 398,576.90 = 139,249.50 : x - Step 2: Convert to fraction form
265,639.42/398,576.90 = 139,249.50/x - Step 3: Cross multiply
265,639.42x = 398,576.90 × 139,249.50 - Step 4: Simplify right side
265,639.42x = 55,501,634,036.55 - Step 5: Solve for x
x = 55,501,634,036.55/265,639.42 - Step 6: Final answer
x = 208,935.99
Related Problems
Find fourth proportional to 132,819.71, 199,288.45 and 69,624.75
Half scale
Find fourth proportional to 531,278.84, 797,153.80 and 278,499
Double scale
Find fourth proportional to 265,640.42, 398,578.40 and 139,250.50
Similar ratio
Find fourth proportional to 398,459.13, 597,865.35 and 208,874.25
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.