Finding the Fourth Proportional to 743,761.12, 1,114,415.68 and 428,483.20
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Solution
The fourth proportional to 743,761.12, 1,114,415.68 and 428,483.20 is: 642,018.50
Step by Step Solution
- Step 1: Write the proportion equation
743,761.12 : 1,114,415.68 = 428,483.20 : x - Step 2: Convert to fraction form
743,761.12/1,114,415.68 = 428,483.20/x - Step 3: Cross multiply
743,761.12x = 1,114,415.68 × 428,483.20 - Step 4: Simplify right side
743,761.12x = 477,508,396,696.58 - Step 5: Solve for x
x = 477,508,396,696.58/743,761.12 - Step 6: Final answer
x = 642,018.50
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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.