Finding the Fourth Proportional to 308,437.28, 462,457.71 and 128,646.75
Calculator
Solution
The fourth proportional to 308,437.28, 462,457.71 and 128,646.75 is: 192,887.45
Step by Step Solution
- Step 1: Write the proportion equation
308,437.28 : 462,457.71 = 128,646.75 : x - Step 2: Convert to fraction form
308,437.28/462,457.71 = 128,646.75/x - Step 3: Cross multiply
308,437.28x = 462,457.71 × 128,646.75 - Step 4: Simplify right side
308,437.28x = 59,493,680,152.15 - Step 5: Solve for x
x = 59,493,680,152.15/308,437.28 - Step 6: Final answer
x = 192,887.45
Related Problems
Find fourth proportional to 154,218.64, 231,228.86 and 64,323.37
Half scale
Find fourth proportional to 616,874.57, 924,915.43 and 257,293.49
Double scale
Find fourth proportional to 308,438.28, 462,459.21 and 128,647.75
Similar ratio
Find fourth proportional to 462,655.92, 693,686.57 and 192,970.12
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.