Finding the Fourth Proportional to 636,694.11, 878,139.95 and 394,839.99
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Solution
The fourth proportional to 636,694.11, 878,139.95 and 394,839.99 is: 544,570.40
Step by Step Solution
- Step 1: Write the proportion equation
636,694.11 : 878,139.95 = 394,839.99 : x - Step 2: Convert to fraction form
636,694.11/878,139.95 = 394,839.99/x - Step 3: Cross multiply
636,694.11x = 878,139.95 × 394,839.99 - Step 4: Simplify right side
636,694.11x = 346,724,767,102.40 - Step 5: Solve for x
x = 346,724,767,102.40/636,694.11 - Step 6: Final answer
x = 544,570.40
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.