Finding the Fourth Proportional to 2,312,128.40, 3,190,713.68 and 1,279,638.19
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Solution
The fourth proportional to 2,312,128.40, 3,190,713.68 and 1,279,638.19 is: 1,765,887.69
Step by Step Solution
- Step 1: Write the proportion equation
2,312,128.40 : 3,190,713.68 = 1,279,638.19 : x - Step 2: Convert to fraction form
2,312,128.40/3,190,713.68 = 1,279,638.19/x - Step 3: Cross multiply
2,312,128.40x = 3,190,713.68 × 1,279,638.19 - Step 4: Simplify right side
2,312,128.40x = 4,082,959,078,283.44 - Step 5: Solve for x
x = 4,082,959,078,283.44/2,312,128.40 - Step 6: Final answer
x = 1,765,887.69
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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.