Finding the Fourth Proportional to 678,311.56, 1,017,611.36 and 257,578.12
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Solution
The fourth proportional to 678,311.56, 1,017,611.36 and 257,578.12 is: 386,421.87
Step by Step Solution
- Step 1: Write the proportion equation
678,311.56 : 1,017,611.36 = 257,578.12 : x - Step 2: Convert to fraction form
678,311.56/1,017,611.36 = 257,578.12/x - Step 3: Cross multiply
678,311.56x = 1,017,611.36 × 257,578.12 - Step 4: Simplify right side
678,311.56x = 262,114,420,999.44 - Step 5: Solve for x
x = 262,114,420,999.44/678,311.56 - Step 6: Final answer
x = 386,421.87
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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.