Finding the Fourth Proportional to 1,557,770, 2,149,722.72 and 842,378
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Solution
The fourth proportional to 1,557,770, 2,149,722.72 and 842,378 is: 1,162,481.70
Step by Step Solution
- Step 1: Write the proportion equation
1,557,770 : 2,149,722.72 = 842,378 : x - Step 2: Convert to fraction form
1,557,770/2,149,722.72 = 842,378/x - Step 3: Cross multiply
1,557,770x = 2,149,722.72 × 842,378 - Step 4: Simplify right side
1,557,770x = 1,810,879,125,428.16 - Step 5: Solve for x
x = 1,810,879,125,428.16/1,557,770 - Step 6: Final answer
x = 1,162,481.70
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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.