Finding the Fourth Proportional to 268,823.20, 403,234.80 and 128,855.20
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Solution
The fourth proportional to 268,823.20, 403,234.80 and 128,855.20 is: 193,282.80
Step by Step Solution
- Step 1: Write the proportion equation
268,823.20 : 403,234.80 = 128,855.20 : x - Step 2: Convert to fraction form
268,823.20/403,234.80 = 128,855.20/x - Step 3: Cross multiply
268,823.20x = 403,234.80 × 128,855.20 - Step 4: Simplify right side
268,823.20x = 51,958,900,800.96 - Step 5: Solve for x
x = 51,958,900,800.96/268,823.20 - Step 6: Final answer
x = 193,282.80
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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.