Finding the Fourth Proportional to 687,991,305.70, 965,908,805.90 and 687,991,305.70
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Solution
The fourth proportional to 687,991,305.70, 965,908,805.90 and 687,991,305.70 is: 965,908,805.90
Step by Step Solution
- Step 1: Write the proportion equation
687,991,305.70 : 965,908,805.90 = 687,991,305.70 : x - Step 2: Convert to fraction form
687,991,305.70/965,908,805.90 = 687,991,305.70/x - Step 3: Cross multiply
687,991,305.70x = 965,908,805.90 × 687,991,305.70 - Step 4: Simplify right side
687,991,305.70x = 664,536,860,558,268,928 - Step 5: Solve for x
x = 664,536,860,558,268,928/687,991,305.70 - Step 6: Final answer
x = 965,908,805.90
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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.