Finding the Fourth Proportional to 1,187,915.70, 1,640,676.80 and 805,278.18
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Solution
The fourth proportional to 1,187,915.70, 1,640,676.80 and 805,278.18 is: 1,112,201.17
Step by Step Solution
- Step 1: Write the proportion equation
1,187,915.70 : 1,640,676.80 = 805,278.18 : x - Step 2: Convert to fraction form
1,187,915.70/1,640,676.80 = 805,278.18/x - Step 3: Cross multiply
1,187,915.70x = 1,640,676.80 × 805,278.18 - Step 4: Simplify right side
1,187,915.70x = 1,321,201,235,637.96 - Step 5: Solve for x
x = 1,321,201,235,637.96/1,187,915.70 - Step 6: Final answer
x = 1,112,201.17
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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.