Finding the Fourth Proportional to 639,397,739.80, 959,096,609.70 and 639,397,739.80
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Solution
The fourth proportional to 639,397,739.80, 959,096,609.70 and 639,397,739.80 is: 959,096,609.70
Step by Step Solution
- Step 1: Write the proportion equation
639,397,739.80 : 959,096,609.70 = 639,397,739.80 : x - Step 2: Convert to fraction form
639,397,739.80/959,096,609.70 = 639,397,739.80/x - Step 3: Cross multiply
639,397,739.80x = 959,096,609.70 × 639,397,739.80 - Step 4: Simplify right side
639,397,739.80x = 613,244,204,492,022,784 - Step 5: Solve for x
x = 613,244,204,492,022,784/639,397,739.80 - Step 6: Final answer
x = 959,096,609.70
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Double scale
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Similar ratio
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1.5x scale
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.