Finding the Fourth Proportional to 2,168,175.78, 2,991,981.78 and 1,188,108.99
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Solution
The fourth proportional to 2,168,175.78, 2,991,981.78 and 1,188,108.99 is: 1,639,535.17
Step by Step Solution
- Step 1: Write the proportion equation
2,168,175.78 : 2,991,981.78 = 1,188,108.99 : x - Step 2: Convert to fraction form
2,168,175.78/2,991,981.78 = 1,188,108.99/x - Step 3: Cross multiply
2,168,175.78x = 2,991,981.78 × 1,188,108.99 - Step 4: Simplify right side
2,168,175.78x = 3,554,800,450,734.20 - Step 5: Solve for x
x = 3,554,800,450,734.20/2,168,175.78 - Step 6: Final answer
x = 1,639,535.17
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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.