Finding the Fourth Proportional to 1,306,815.12, 1,959,979.68 and 408,278.88
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Solution
The fourth proportional to 1,306,815.12, 1,959,979.68 and 408,278.88 is: 612,342.40
Step by Step Solution
- Step 1: Write the proportion equation
1,306,815.12 : 1,959,979.68 = 408,278.88 : x - Step 2: Convert to fraction form
1,306,815.12/1,959,979.68 = 408,278.88/x - Step 3: Cross multiply
1,306,815.12x = 1,959,979.68 × 408,278.88 - Step 4: Simplify right side
1,306,815.12x = 800,218,308,573.16 - Step 5: Solve for x
x = 800,218,308,573.16/1,306,815.12 - Step 6: Final answer
x = 612,342.40
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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.