Finding the Fourth Proportional to 1,912,841.28, 2,639,680.80 and 1,053,408.60
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Solution
The fourth proportional to 1,912,841.28, 2,639,680.80 and 1,053,408.60 is: 1,453,681.75
Step by Step Solution
- Step 1: Write the proportion equation
1,912,841.28 : 2,639,680.80 = 1,053,408.60 : x - Step 2: Convert to fraction form
1,912,841.28/2,639,680.80 = 1,053,408.60/x - Step 3: Cross multiply
1,912,841.28x = 2,639,680.80 × 1,053,408.60 - Step 4: Simplify right side
1,912,841.28x = 2,780,662,455,974.88 - Step 5: Solve for x
x = 2,780,662,455,974.88/1,912,841.28 - Step 6: Final answer
x = 1,453,681.75
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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.