Finding the Fourth Proportional to 1,214,137.80, 1,821,139.74 and 372,689.28
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Solution
The fourth proportional to 1,214,137.80, 1,821,139.74 and 372,689.28 is: 559,013.37
Step by Step Solution
- Step 1: Write the proportion equation
1,214,137.80 : 1,821,139.74 = 372,689.28 : x - Step 2: Convert to fraction form
1,214,137.80/1,821,139.74 = 372,689.28/x - Step 3: Cross multiply
1,214,137.80x = 1,821,139.74 × 372,689.28 - Step 4: Simplify right side
1,214,137.80x = 678,719,258,479.99 - Step 5: Solve for x
x = 678,719,258,479.99/1,214,137.80 - Step 6: Final answer
x = 559,013.37
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.