Finding the Fourth Proportional to 278,817.21, 418,234.01 and 68,455.13
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Solution
The fourth proportional to 278,817.21, 418,234.01 and 68,455.13 is: 102,684.70
Step by Step Solution
- Step 1: Write the proportion equation
278,817.21 : 418,234.01 = 68,455.13 : x - Step 2: Convert to fraction form
278,817.21/418,234.01 = 68,455.13/x - Step 3: Cross multiply
278,817.21x = 418,234.01 × 68,455.13 - Step 4: Simplify right side
278,817.21x = 28,630,261,091.53 - Step 5: Solve for x
x = 28,630,261,091.53/278,817.21 - Step 6: Final answer
x = 102,684.70
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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.