Finding the Fourth Proportional to 428,422.21, 638,803.11 and 416,651.63
Calculator
Solution
The fourth proportional to 428,422.21, 638,803.11 and 416,651.63 is: 621,252.47
Step by Step Solution
- Step 1: Write the proportion equation
428,422.21 : 638,803.11 = 416,651.63 : x - Step 2: Convert to fraction form
428,422.21/638,803.11 = 416,651.63/x - Step 3: Cross multiply
428,422.21x = 638,803.11 × 416,651.63 - Step 4: Simplify right side
428,422.21x = 266,158,357,030.57 - Step 5: Solve for x
x = 266,158,357,030.57/428,422.21 - Step 6: Final answer
x = 621,252.47
Related Problems
Find fourth proportional to 214,211.11, 319,401.56 and 208,325.82
Half scale
Find fourth proportional to 856,844.42, 1,277,606.22 and 833,303.26
Double scale
Find fourth proportional to 428,423.21, 638,804.60 and 416,652.63
Similar ratio
Find fourth proportional to 642,633.32, 958,204.67 and 624,977.45
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.