Finding the Fourth Proportional to 2,168,172.78, 2,991,977.64 and 1,188,105.99
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Solution
The fourth proportional to 2,168,172.78, 2,991,977.64 and 1,188,105.99 is: 1,639,531.03
Step by Step Solution
- Step 1: Write the proportion equation
2,168,172.78 : 2,991,977.64 = 1,188,105.99 : x - Step 2: Convert to fraction form
2,168,172.78/2,991,977.64 = 1,188,105.99/x - Step 3: Cross multiply
2,168,172.78x = 2,991,977.64 × 1,188,105.99 - Step 4: Simplify right side
2,168,172.78x = 3,554,786,556,030.06 - Step 5: Solve for x
x = 3,554,786,556,030.06/2,168,172.78 - Step 6: Final answer
x = 1,639,531.03
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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.