Finding the Fourth Proportional to 408,080,639.80, 612,120,959.70 and 408,080,639.80
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Solution
The fourth proportional to 408,080,639.80, 612,120,959.70 and 408,080,639.80 is: 612,120,959.70
Step by Step Solution
- Step 1: Write the proportion equation
408,080,639.80 : 612,120,959.70 = 408,080,639.80 : x - Step 2: Convert to fraction form
408,080,639.80/612,120,959.70 = 408,080,639.80/x - Step 3: Cross multiply
408,080,639.80x = 612,120,959.70 × 408,080,639.80 - Step 4: Simplify right side
408,080,639.80x = 249,794,712,869,366,048 - Step 5: Solve for x
x = 249,794,712,869,366,048/408,080,639.80 - Step 6: Final answer
x = 612,120,959.70
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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.