Finding the Fourth Proportional to 678,129.20, 1,017,193.80 and 394,305.20
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Solution
The fourth proportional to 678,129.20, 1,017,193.80 and 394,305.20 is: 591,457.80
Step by Step Solution
- Step 1: Write the proportion equation
678,129.20 : 1,017,193.80 = 394,305.20 : x - Step 2: Convert to fraction form
678,129.20/1,017,193.80 = 394,305.20/x - Step 3: Cross multiply
678,129.20x = 1,017,193.80 × 394,305.20 - Step 4: Simplify right side
678,129.20x = 401,084,804,747.76 - Step 5: Solve for x
x = 401,084,804,747.76/678,129.20 - Step 6: Final answer
x = 591,457.80
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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.