Finding the Fourth Proportional to 639,738,037.70, 957,906,445.35 and 639,738,037.70
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Solution
The fourth proportional to 639,738,037.70, 957,906,445.35 and 639,738,037.70 is: 957,906,445.35
Step by Step Solution
- Step 1: Write the proportion equation
639,738,037.70 : 957,906,445.35 = 639,738,037.70 : x - Step 2: Convert to fraction form
639,738,037.70/957,906,445.35 = 639,738,037.70/x - Step 3: Cross multiply
639,738,037.70x = 957,906,445.35 × 639,738,037.70 - Step 4: Simplify right side
639,738,037.70x = 612,809,189,648,391,296 - Step 5: Solve for x
x = 612,809,189,648,391,296/639,738,037.70 - Step 6: Final answer
x = 957,906,445.35
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Double scale
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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.