Finding the Fourth Proportional to 287,885.97, 431,879.99 and 138,397.23
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Solution
The fourth proportional to 287,885.97, 431,879.99 and 138,397.23 is: 207,620.38
Step by Step Solution
- Step 1: Write the proportion equation
287,885.97 : 431,879.99 = 138,397.23 : x - Step 2: Convert to fraction form
287,885.97/431,879.99 = 138,397.23/x - Step 3: Cross multiply
287,885.97x = 431,879.99 × 138,397.23 - Step 4: Simplify right side
287,885.97x = 59,770,993,616.44 - Step 5: Solve for x
x = 59,770,993,616.44/287,885.97 - Step 6: Final answer
x = 207,620.38
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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.