Finding the Fourth Proportional to 226,439.20, 339,658.80 and 128,135.20
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Solution
The fourth proportional to 226,439.20, 339,658.80 and 128,135.20 is: 192,202.80
Step by Step Solution
- Step 1: Write the proportion equation
226,439.20 : 339,658.80 = 128,135.20 : x - Step 2: Convert to fraction form
226,439.20/339,658.80 = 128,135.20/x - Step 3: Cross multiply
226,439.20x = 339,658.80 × 128,135.20 - Step 4: Simplify right side
226,439.20x = 43,522,248,269.76 - Step 5: Solve for x
x = 43,522,248,269.76/226,439.20 - Step 6: Final answer
x = 192,202.80
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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.