Finding the Fourth Proportional to 228,639.20, 315,532.08 and 128,035.04
Calculator
Solution
The fourth proportional to 228,639.20, 315,532.08 and 128,035.04 is: 176,693.95
Step by Step Solution
- Step 1: Write the proportion equation
228,639.20 : 315,532.08 = 128,035.04 : x - Step 2: Convert to fraction form
228,639.20/315,532.08 = 128,035.04/x - Step 3: Cross multiply
228,639.20x = 315,532.08 × 128,035.04 - Step 4: Simplify right side
228,639.20x = 40,399,162,484.08 - Step 5: Solve for x
x = 40,399,162,484.08/228,639.20 - Step 6: Final answer
x = 176,693.95
Related Problems
Find fourth proportional to 114,319.60, 157,766.04 and 64,017.52
Half scale
Find fourth proportional to 457,278.40, 631,064.16 and 256,070.08
Double scale
Find fourth proportional to 228,640.20, 315,533.46 and 128,036.04
Similar ratio
Find fourth proportional to 342,958.80, 473,298.12 and 192,052.56
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.