Finding the Fourth Proportional to 685,373.88, 1,028,406.42 and 386,187.96
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Solution
The fourth proportional to 685,373.88, 1,028,406.42 and 386,187.96 is: 579,476.68
Step by Step Solution
- Step 1: Write the proportion equation
685,373.88 : 1,028,406.42 = 386,187.96 : x - Step 2: Convert to fraction form
685,373.88/1,028,406.42 = 386,187.96/x - Step 3: Cross multiply
685,373.88x = 1,028,406.42 × 386,187.96 - Step 4: Simplify right side
685,373.88x = 397,158,177,390.70 - Step 5: Solve for x
x = 397,158,177,390.70/685,373.88 - Step 6: Final answer
x = 579,476.68
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.