Finding the Fourth Proportional to 512,221.20, 768,331.80 and 196,685.70
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Solution
The fourth proportional to 512,221.20, 768,331.80 and 196,685.70 is: 295,028.55
Step by Step Solution
- Step 1: Write the proportion equation
512,221.20 : 768,331.80 = 196,685.70 : x - Step 2: Convert to fraction form
512,221.20/768,331.80 = 196,685.70/x - Step 3: Cross multiply
512,221.20x = 768,331.80 × 196,685.70 - Step 4: Simplify right side
512,221.20x = 151,119,877,915.26 - Step 5: Solve for x
x = 151,119,877,915.26/512,221.20 - Step 6: Final answer
x = 295,028.55
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Similar ratio
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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.