Finding the Fourth Proportional to 309,963.36, 427,879.44 and 209,497.44
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Solution
The fourth proportional to 309,963.36, 427,879.44 and 209,497.44 is: 289,194.33
Step by Step Solution
- Step 1: Write the proportion equation
309,963.36 : 427,879.44 = 209,497.44 : x - Step 2: Convert to fraction form
309,963.36/427,879.44 = 209,497.44/x - Step 3: Cross multiply
309,963.36x = 427,879.44 × 209,497.44 - Step 4: Simplify right side
309,963.36x = 89,639,647,308.63 - Step 5: Solve for x
x = 89,639,647,308.63/309,963.36 - Step 6: Final answer
x = 289,194.33
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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.