Finding the Fourth Proportional to 678,163.20, 1,017,244.80 and 394,339.20
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Solution
The fourth proportional to 678,163.20, 1,017,244.80 and 394,339.20 is: 591,508.80
Step by Step Solution
- Step 1: Write the proportion equation
678,163.20 : 1,017,244.80 = 394,339.20 : x - Step 2: Convert to fraction form
678,163.20/1,017,244.80 = 394,339.20/x - Step 3: Cross multiply
678,163.20x = 1,017,244.80 × 394,339.20 - Step 4: Simplify right side
678,163.20x = 401,139,500,636.16 - Step 5: Solve for x
x = 401,139,500,636.16/678,163.20 - Step 6: Final answer
x = 591,508.80
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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.