Finding the Fourth Proportional to 408,902.20, 613,353.30 and 128,447.80
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Solution
The fourth proportional to 408,902.20, 613,353.30 and 128,447.80 is: 192,671.70
Step by Step Solution
- Step 1: Write the proportion equation
408,902.20 : 613,353.30 = 128,447.80 : x - Step 2: Convert to fraction form
408,902.20/613,353.30 = 128,447.80/x - Step 3: Cross multiply
408,902.20x = 613,353.30 × 128,447.80 - Step 4: Simplify right side
408,902.20x = 78,783,882,007.74 - Step 5: Solve for x
x = 78,783,882,007.74/408,902.20 - Step 6: Final answer
x = 192,671.70
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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.