Finding the Fourth Proportional to 821,491.20, 1,230,163.20 and 539,481.60
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Solution
The fourth proportional to 821,491.20, 1,230,163.20 and 539,481.60 is: 807,860.65
Step by Step Solution
- Step 1: Write the proportion equation
821,491.20 : 1,230,163.20 = 539,481.60 : x - Step 2: Convert to fraction form
821,491.20/1,230,163.20 = 539,481.60/x - Step 3: Cross multiply
821,491.20x = 1,230,163.20 × 539,481.60 - Step 4: Simplify right side
821,491.20x = 663,650,411,397.12 - Step 5: Solve for x
x = 663,650,411,397.12/821,491.20 - Step 6: Final answer
x = 807,860.65
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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.