Finding the Fourth Proportional to 3,990,708.37, 5,507,177.34 and 2,155,166.48
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Solution
The fourth proportional to 3,990,708.37, 5,507,177.34 and 2,155,166.48 is: 2,974,129.63
Step by Step Solution
- Step 1: Write the proportion equation
3,990,708.37 : 5,507,177.34 = 2,155,166.48 : x - Step 2: Convert to fraction form
3,990,708.37/5,507,177.34 = 2,155,166.48/x - Step 3: Cross multiply
3,990,708.37x = 5,507,177.34 × 2,155,166.48 - Step 4: Simplify right side
3,990,708.37x = 11,868,884,002,583.56 - Step 5: Solve for x
x = 11,868,884,002,583.56/3,990,708.37 - Step 6: Final answer
x = 2,974,129.63
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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.