Finding the Fourth Proportional to 5,419,749.12, 7,478,714.88 and 3,128,647.92
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Solution
The fourth proportional to 5,419,749.12, 7,478,714.88 and 3,128,647.92 is: 4,317,223.04
Step by Step Solution
- Step 1: Write the proportion equation
5,419,749.12 : 7,478,714.88 = 3,128,647.92 : x - Step 2: Convert to fraction form
5,419,749.12/7,478,714.88 = 3,128,647.92/x - Step 3: Cross multiply
5,419,749.12x = 7,478,714.88 × 3,128,647.92 - Step 4: Simplify right side
5,419,749.12x = 23,398,265,753,585.05 - Step 5: Solve for x
x = 23,398,265,753,585.05/5,419,749.12 - Step 6: Final answer
x = 4,317,223.04
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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.