Finding the Fourth Proportional to 521,638,469.80, 782,457,704.70 and 279,773,765.80
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Solution
The fourth proportional to 521,638,469.80, 782,457,704.70 and 279,773,765.80 is: 419,660,648.70
Step by Step Solution
- Step 1: Write the proportion equation
521,638,469.80 : 782,457,704.70 = 279,773,765.80 : x - Step 2: Convert to fraction form
521,638,469.80/782,457,704.70 = 279,773,765.80/x - Step 3: Cross multiply
521,638,469.80x = 782,457,704.70 × 279,773,765.80 - Step 4: Simplify right side
521,638,469.80x = 218,911,138,623,143,392 - Step 5: Solve for x
x = 218,911,138,623,143,392/521,638,469.80 - Step 6: Final answer
x = 419,660,648.70
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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.