Finding the Fourth Proportional to 3,897,694.49, 5,378,853.13 and 2,155,481.08
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Solution
The fourth proportional to 3,897,694.49, 5,378,853.13 and 2,155,481.08 is: 2,974,583.10
Step by Step Solution
- Step 1: Write the proportion equation
3,897,694.49 : 5,378,853.13 = 2,155,481.08 : x - Step 2: Convert to fraction form
3,897,694.49/5,378,853.13 = 2,155,481.08/x - Step 3: Cross multiply
3,897,694.49x = 5,378,853.13 × 2,155,481.08 - Step 4: Simplify right side
3,897,694.49x = 11,594,016,134,977.95 - Step 5: Solve for x
x = 11,594,016,134,977.95/3,897,694.49 - Step 6: Final answer
x = 2,974,583.10
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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.