Finding the Fourth Proportional to 387,079.62, 580,563.11 and 120,778.18
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Solution
The fourth proportional to 387,079.62, 580,563.11 and 120,778.18 is: 181,149.70
Step by Step Solution
- Step 1: Write the proportion equation
387,079.62 : 580,563.11 = 120,778.18 : x - Step 2: Convert to fraction form
387,079.62/580,563.11 = 120,778.18/x - Step 3: Cross multiply
387,079.62x = 580,563.11 × 120,778.18 - Step 4: Simplify right side
387,079.62x = 70,119,355,800.94 - Step 5: Solve for x
x = 70,119,355,800.94/387,079.62 - Step 6: Final answer
x = 181,149.70
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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.