Finding the Fourth Proportional to 305,938.62, 421,961.67 and 221,335.74
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Solution
The fourth proportional to 305,938.62, 421,961.67 and 221,335.74 is: 305,274.30
Step by Step Solution
- Step 1: Write the proportion equation
305,938.62 : 421,961.67 = 221,335.74 : x - Step 2: Convert to fraction form
305,938.62/421,961.67 = 221,335.74/x - Step 3: Cross multiply
305,938.62x = 421,961.67 × 221,335.74 - Step 4: Simplify right side
305,938.62x = 93,395,198,481.09 - Step 5: Solve for x
x = 93,395,198,481.09/305,938.62 - Step 6: Final answer
x = 305,274.30
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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.