Finding the Fourth Proportional to 639,765,110.70, 958,212,775.35 and 639,765,110.70
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Solution
The fourth proportional to 639,765,110.70, 958,212,775.35 and 639,765,110.70 is: 958,212,775.35
Step by Step Solution
- Step 1: Write the proportion equation
639,765,110.70 : 958,212,775.35 = 639,765,110.70 : x - Step 2: Convert to fraction form
639,765,110.70/958,212,775.35 = 639,765,110.70/x - Step 3: Cross multiply
639,765,110.70x = 958,212,775.35 × 639,765,110.70 - Step 4: Simplify right side
639,765,110.70x = 613,031,102,295,947,008 - Step 5: Solve for x
x = 613,031,102,295,947,008/639,765,110.70 - Step 6: Final answer
x = 958,212,775.35
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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.