Finding the Fourth Proportional to 3,998,717.91, 5,518,213.91 and 2,163,171.60
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Solution
The fourth proportional to 3,998,717.91, 5,518,213.91 and 2,163,171.60 is: 2,985,167.71
Step by Step Solution
- Step 1: Write the proportion equation
3,998,717.91 : 5,518,213.91 = 2,163,171.60 : x - Step 2: Convert to fraction form
3,998,717.91/5,518,213.91 = 2,163,171.60/x - Step 3: Cross multiply
3,998,717.91x = 5,518,213.91 × 2,163,171.60 - Step 4: Simplify right side
3,998,717.91x = 11,936,843,602,021.10 - Step 5: Solve for x
x = 11,936,843,602,021.10/3,998,717.91 - Step 6: Final answer
x = 2,985,167.71
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1.5x scale
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.