Finding the Fourth Proportional to 1,258,287,446.80, 1,887,431,170.20 and 768,511,421.20
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Solution
The fourth proportional to 1,258,287,446.80, 1,887,431,170.20 and 768,511,421.20 is: 1,152,767,131.80
Step by Step Solution
- Step 1: Write the proportion equation
1,258,287,446.80 : 1,887,431,170.20 = 768,511,421.20 : x - Step 2: Convert to fraction form
1,258,287,446.80/1,887,431,170.20 = 768,511,421.20/x - Step 3: Cross multiply
1,258,287,446.80x = 1,887,431,170.20 × 768,511,421.20 - Step 4: Simplify right side
1,258,287,446.80x = 1,450,512,411,027,581,184 - Step 5: Solve for x
x = 1,450,512,411,027,581,184/1,258,287,446.80 - Step 6: Final answer
x = 1,152,767,131.80
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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.