Finding the Fourth Proportional to 621,768.12, 857,963.80 and 392,238.80
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Solution
The fourth proportional to 621,768.12, 857,963.80 and 392,238.80 is: 541,241.47
Step by Step Solution
- Step 1: Write the proportion equation
621,768.12 : 857,963.80 = 392,238.80 : x - Step 2: Convert to fraction form
621,768.12/857,963.80 = 392,238.80/x - Step 3: Cross multiply
621,768.12x = 857,963.80 × 392,238.80 - Step 4: Simplify right side
621,768.12x = 336,526,691,355.44 - Step 5: Solve for x
x = 336,526,691,355.44/621,768.12 - Step 6: Final answer
x = 541,241.47
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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.