Finding the Fourth Proportional to 1,261,107.09, 1,740,369.75 and 688,178.70
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Solution
The fourth proportional to 1,261,107.09, 1,740,369.75 and 688,178.70 is: 949,709.51
Step by Step Solution
- Step 1: Write the proportion equation
1,261,107.09 : 1,740,369.75 = 688,178.70 : x - Step 2: Convert to fraction form
1,261,107.09/1,740,369.75 = 688,178.70/x - Step 3: Cross multiply
1,261,107.09x = 1,740,369.75 × 688,178.70 - Step 4: Simplify right side
1,261,107.09x = 1,197,685,392,074.33 - Step 5: Solve for x
x = 1,197,685,392,074.33/1,261,107.09 - Step 6: Final answer
x = 949,709.51
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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.