Finding the Fourth Proportional to 786,432,670.38, 1,179,841,067.51 and 261,800,757.99
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Solution
The fourth proportional to 786,432,670.38, 1,179,841,067.51 and 261,800,757.99 is: 392,765,073.75
Step by Step Solution
- Step 1: Write the proportion equation
786,432,670.38 : 1,179,841,067.51 = 261,800,757.99 : x - Step 2: Convert to fraction form
786,432,670.38/1,179,841,067.51 = 261,800,757.99/x - Step 3: Cross multiply
786,432,670.38x = 1,179,841,067.51 × 261,800,757.99 - Step 4: Simplify right side
786,432,670.38x = 308,883,285,780,539,776 - Step 5: Solve for x
x = 308,883,285,780,539,776/786,432,670.38 - Step 6: Final answer
x = 392,765,073.75
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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.