Finding the Fourth Proportional to 812,722.21, 1,219,163.49 and 280,173.13
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Solution
The fourth proportional to 812,722.21, 1,219,163.49 and 280,173.13 is: 420,287.33
Step by Step Solution
- Step 1: Write the proportion equation
812,722.21 : 1,219,163.49 = 280,173.13 : x - Step 2: Convert to fraction form
812,722.21/1,219,163.49 = 280,173.13/x - Step 3: Cross multiply
812,722.21x = 1,219,163.49 × 280,173.13 - Step 4: Simplify right side
812,722.21x = 341,576,850,975.02 - Step 5: Solve for x
x = 341,576,850,975.02/812,722.21 - Step 6: Final answer
x = 420,287.33
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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.