Finding the Fourth Proportional to 1,188,979.44, 1,640,789.36 and 645,115.08
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Solution
The fourth proportional to 1,188,979.44, 1,640,789.36 and 645,115.08 is: 890,257.58
Step by Step Solution
- Step 1: Write the proportion equation
1,188,979.44 : 1,640,789.36 = 645,115.08 : x - Step 2: Convert to fraction form
1,188,979.44/1,640,789.36 = 645,115.08/x - Step 3: Cross multiply
1,188,979.44x = 1,640,789.36 × 645,115.08 - Step 4: Simplify right side
1,188,979.44x = 1,058,497,959,239.55 - Step 5: Solve for x
x = 1,058,497,959,239.55/1,188,979.44 - Step 6: Final answer
x = 890,257.58
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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.