Finding the Fourth Proportional to 811,206.21, 1,216,716.35 and 212,225.17
Calculator
Solution
The fourth proportional to 811,206.21, 1,216,716.35 and 212,225.17 is: 318,313.43
Step by Step Solution
- Step 1: Write the proportion equation
811,206.21 : 1,216,716.35 = 212,225.17 : x - Step 2: Convert to fraction form
811,206.21/1,216,716.35 = 212,225.17/x - Step 3: Cross multiply
811,206.21x = 1,216,716.35 × 212,225.17 - Step 4: Simplify right side
811,206.21x = 258,217,834,220.53 - Step 5: Solve for x
x = 258,217,834,220.53/811,206.21 - Step 6: Final answer
x = 318,313.43
Related Problems
Find fourth proportional to 405,603.11, 608,358.18 and 106,112.59
Half scale
Find fourth proportional to 1,622,412.42, 2,433,432.70 and 424,450.34
Double scale
Find fourth proportional to 811,207.21, 1,216,717.85 and 212,226.17
Similar ratio
Find fourth proportional to 1,216,809.32, 1,825,074.53 and 318,337.76
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.