Finding the Fourth Proportional to 298,129.78, 447,197.91 and 87,771.70
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Solution
The fourth proportional to 298,129.78, 447,197.91 and 87,771.70 is: 131,658.50
Step by Step Solution
- Step 1: Write the proportion equation
298,129.78 : 447,197.91 = 87,771.70 : x - Step 2: Convert to fraction form
298,129.78/447,197.91 = 87,771.70/x - Step 3: Cross multiply
298,129.78x = 447,197.91 × 87,771.70 - Step 4: Simplify right side
298,129.78x = 39,251,320,797.15 - Step 5: Solve for x
x = 39,251,320,797.15/298,129.78 - Step 6: Final answer
x = 131,658.50
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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.