Finding the Fourth Proportional to 428,921.43, 642,963.76 and 204,221.49
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Solution
The fourth proportional to 428,921.43, 642,963.76 and 204,221.49 is: 306,133.03
Step by Step Solution
- Step 1: Write the proportion equation
428,921.43 : 642,963.76 = 204,221.49 : x - Step 2: Convert to fraction form
428,921.43/642,963.76 = 204,221.49/x - Step 3: Cross multiply
428,921.43x = 642,963.76 × 204,221.49 - Step 4: Simplify right side
428,921.43x = 131,307,014,161.54 - Step 5: Solve for x
x = 131,307,014,161.54/428,921.43 - Step 6: Final answer
x = 306,133.03
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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.