Finding the Fourth Proportional to 678,121.70, 1,017,182.55 and 394,297.70
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Solution
The fourth proportional to 678,121.70, 1,017,182.55 and 394,297.70 is: 591,446.55
Step by Step Solution
- Step 1: Write the proportion equation
678,121.70 : 1,017,182.55 = 394,297.70 : x - Step 2: Convert to fraction form
678,121.70/1,017,182.55 = 394,297.70/x - Step 3: Cross multiply
678,121.70x = 1,017,182.55 × 394,297.70 - Step 4: Simplify right side
678,121.70x = 401,072,739,945.14 - Step 5: Solve for x
x = 401,072,739,945.14/678,121.70 - Step 6: Final answer
x = 591,446.55
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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.