Finding the Fourth Proportional to 1,010,657,115.80, 1,515,985,673.70 and 617,815,928.60
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Solution
The fourth proportional to 1,010,657,115.80, 1,515,985,673.70 and 617,815,928.60 is: 926,723,892.90
Step by Step Solution
- Step 1: Write the proportion equation
1,010,657,115.80 : 1,515,985,673.70 = 617,815,928.60 : x - Step 2: Convert to fraction form
1,010,657,115.80/1,515,985,673.70 = 617,815,928.60/x - Step 3: Cross multiply
1,010,657,115.80x = 1,515,985,673.70 × 617,815,928.60 - Step 4: Simplify right side
1,010,657,115.80x = 936,600,096,741,262,208 - Step 5: Solve for x
x = 936,600,096,741,262,208/1,010,657,115.80 - Step 6: Final answer
x = 926,723,892.90
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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.