Finding the Fourth Proportional to 621,436.37, 857,699.97 and 388,971.13
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Solution
The fourth proportional to 621,436.37, 857,699.97 and 388,971.13 is: 536,853.88
Step by Step Solution
- Step 1: Write the proportion equation
621,436.37 : 857,699.97 = 388,971.13 : x - Step 2: Convert to fraction form
621,436.37/857,699.97 = 388,971.13/x - Step 3: Cross multiply
621,436.37x = 857,699.97 × 388,971.13 - Step 4: Simplify right side
621,436.37x = 333,620,526,725.13 - Step 5: Solve for x
x = 333,620,526,725.13/621,436.37 - Step 6: Final answer
x = 536,853.88
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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.