Finding the Fourth Proportional to 1,987,379.70, 2,742,583.94 and 1,081,961.70
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Solution
The fourth proportional to 1,987,379.70, 2,742,583.94 and 1,081,961.70 is: 1,493,107.12
Step by Step Solution
- Step 1: Write the proportion equation
1,987,379.70 : 2,742,583.94 = 1,081,961.70 : x - Step 2: Convert to fraction form
1,987,379.70/2,742,583.94 = 1,081,961.70/x - Step 3: Cross multiply
1,987,379.70x = 2,742,583.94 × 1,081,961.70 - Step 4: Simplify right side
1,987,379.70x = 2,967,370,782,115.10 - Step 5: Solve for x
x = 2,967,370,782,115.10/1,987,379.70 - Step 6: Final answer
x = 1,493,107.12
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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.