Finding the Fourth Proportional to 639,760,285.80, 959,640,428.70 and 542,905,163.55
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Solution
The fourth proportional to 639,760,285.80, 959,640,428.70 and 542,905,163.55 is: 814,357,745.33
Step by Step Solution
- Step 1: Write the proportion equation
639,760,285.80 : 959,640,428.70 = 542,905,163.55 : x - Step 2: Convert to fraction form
639,760,285.80/959,640,428.70 = 542,905,163.55/x - Step 3: Cross multiply
639,760,285.80x = 959,640,428.70 × 542,905,163.55 - Step 4: Simplify right side
639,760,285.80x = 520,993,743,892,565,568 - Step 5: Solve for x
x = 520,993,743,892,565,568/639,760,285.80 - Step 6: Final answer
x = 814,357,745.33
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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.