Finding the Fourth Proportional to 764,877.70, 1,147,644.60 and 390,900.70
Calculator
Solution
The fourth proportional to 764,877.70, 1,147,644.60 and 390,900.70 is: 586,518.70
Step by Step Solution
- Step 1: Write the proportion equation
764,877.70 : 1,147,644.60 = 390,900.70 : x - Step 2: Convert to fraction form
764,877.70/1,147,644.60 = 390,900.70/x - Step 3: Cross multiply
764,877.70x = 1,147,644.60 × 390,900.70 - Step 4: Simplify right side
764,877.70x = 448,615,077,491.22 - Step 5: Solve for x
x = 448,615,077,491.22/764,877.70 - Step 6: Final answer
x = 586,518.70
Related Problems
Find fourth proportional to 382,438.85, 573,822.30 and 195,450.35
Half scale
Find fourth proportional to 1,529,755.40, 2,295,289.20 and 781,801.40
Double scale
Find fourth proportional to 764,878.70, 1,147,646.10 and 390,901.70
Similar ratio
Find fourth proportional to 1,147,316.55, 1,721,466.90 and 586,351.05
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.