Finding the Fourth Proportional to 860,959,681.20, 1,207,639,378.80 and 860,959,681.20
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Solution
The fourth proportional to 860,959,681.20, 1,207,639,378.80 and 860,959,681.20 is: 1,207,639,378.80
Step by Step Solution
- Step 1: Write the proportion equation
860,959,681.20 : 1,207,639,378.80 = 860,959,681.20 : x - Step 2: Convert to fraction form
860,959,681.20/1,207,639,378.80 = 860,959,681.20/x - Step 3: Cross multiply
860,959,681.20x = 1,207,639,378.80 × 860,959,681.20 - Step 4: Simplify right side
860,959,681.20x = 1,039,728,814,576,214,016 - Step 5: Solve for x
x = 1,039,728,814,576,214,016/860,959,681.20 - Step 6: Final answer
x = 1,207,639,378.80
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.