Finding the Fourth Proportional to 3,998,689.62, 5,518,174.92 and 2,163,143.36
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Solution
The fourth proportional to 3,998,689.62, 5,518,174.92 and 2,163,143.36 is: 2,985,128.77
Step by Step Solution
- Step 1: Write the proportion equation
3,998,689.62 : 5,518,174.92 = 2,163,143.36 : x - Step 2: Convert to fraction form
3,998,689.62/5,518,174.92 = 2,163,143.36/x - Step 3: Cross multiply
3,998,689.62x = 5,518,174.92 × 2,163,143.36 - Step 4: Simplify right side
3,998,689.62x = 11,936,603,437,516.53 - Step 5: Solve for x
x = 11,936,603,437,516.53/3,998,689.62 - Step 6: Final answer
x = 2,985,128.77
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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.