Finding the Fourth Proportional to 704,076,942.20, 1,056,115,413.30 and 643,560,999.80
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Solution
The fourth proportional to 704,076,942.20, 1,056,115,413.30 and 643,560,999.80 is: 965,341,499.70
Step by Step Solution
- Step 1: Write the proportion equation
704,076,942.20 : 1,056,115,413.30 = 643,560,999.80 : x - Step 2: Convert to fraction form
704,076,942.20/1,056,115,413.30 = 643,560,999.80/x - Step 3: Cross multiply
704,076,942.20x = 1,056,115,413.30 × 643,560,999.80 - Step 4: Simplify right side
704,076,942.20x = 679,674,691,287,538,176 - Step 5: Solve for x
x = 679,674,691,287,538,176/704,076,942.20 - Step 6: Final answer
x = 965,341,499.70
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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.