Finding the Fourth Proportional to 620,817.47, 855,911.00 and 405,583.55
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Solution
The fourth proportional to 620,817.47, 855,911.00 and 405,583.55 is: 559,171.47
Step by Step Solution
- Step 1: Write the proportion equation
620,817.47 : 855,911.00 = 405,583.55 : x - Step 2: Convert to fraction form
620,817.47/855,911.00 = 405,583.55/x - Step 3: Cross multiply
620,817.47x = 855,911.00 × 405,583.55 - Step 4: Simplify right side
620,817.47x = 347,143,419,836.13 - Step 5: Solve for x
x = 347,143,419,836.13/620,817.47 - Step 6: Final answer
x = 559,171.47
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.