Finding the Fourth Proportional to 2,155,691.68, 2,974,815.20 and 1,188,911.84
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Solution
The fourth proportional to 2,155,691.68, 2,974,815.20 and 1,188,911.84 is: 1,640,676.65
Step by Step Solution
- Step 1: Write the proportion equation
2,155,691.68 : 2,974,815.20 = 1,188,911.84 : x - Step 2: Convert to fraction form
2,155,691.68/2,974,815.20 = 1,188,911.84/x - Step 3: Cross multiply
2,155,691.68x = 2,974,815.20 × 1,188,911.84 - Step 4: Simplify right side
2,155,691.68x = 3,536,793,013,091.97 - Step 5: Solve for x
x = 3,536,793,013,091.97/2,155,691.68 - Step 6: Final answer
x = 1,640,676.65
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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.