Finding the Fourth Proportional to 221,382.38, 305,531.21 and 135,391.67
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Solution
The fourth proportional to 221,382.38, 305,531.21 and 135,391.67 is: 186,854.89
Step by Step Solution
- Step 1: Write the proportion equation
221,382.38 : 305,531.21 = 135,391.67 : x - Step 2: Convert to fraction form
221,382.38/305,531.21 = 135,391.67/x - Step 3: Cross multiply
221,382.38x = 305,531.21 × 135,391.67 - Step 4: Simplify right side
221,382.38x = 41,366,378,554.41 - Step 5: Solve for x
x = 41,366,378,554.41/221,382.38 - Step 6: Final answer
x = 186,854.89
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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.