Finding the Fourth Proportional to 3,931,287.21, 5,424,278.81 and 2,211,780.33
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Solution
The fourth proportional to 3,931,287.21, 5,424,278.81 and 2,211,780.33 is: 3,051,751.89
Step by Step Solution
- Step 1: Write the proportion equation
3,931,287.21 : 5,424,278.81 = 2,211,780.33 : x - Step 2: Convert to fraction form
3,931,287.21/5,424,278.81 = 2,211,780.33/x - Step 3: Cross multiply
3,931,287.21x = 5,424,278.81 × 2,211,780.33 - Step 4: Simplify right side
3,931,287.21x = 11,997,313,165,334.91 - Step 5: Solve for x
x = 11,997,313,165,334.91/3,931,287.21 - Step 6: Final answer
x = 3,051,751.89
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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.