Finding the Fourth Proportional to 2,081,936.80, 3,122,905.20 and 1,242,128.80
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Solution
The fourth proportional to 2,081,936.80, 3,122,905.20 and 1,242,128.80 is: 1,863,193.20
Step by Step Solution
- Step 1: Write the proportion equation
2,081,936.80 : 3,122,905.20 = 1,242,128.80 : x - Step 2: Convert to fraction form
2,081,936.80/3,122,905.20 = 1,242,128.80/x - Step 3: Cross multiply
2,081,936.80x = 3,122,905.20 × 1,242,128.80 - Step 4: Simplify right side
2,081,936.80x = 3,879,050,488,589.76 - Step 5: Solve for x
x = 3,879,050,488,589.76/2,081,936.80 - Step 6: Final answer
x = 1,863,193.20
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.