Finding the Fourth Proportional to 641,717.40, 961,409.70 and 392,107.80
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Solution
The fourth proportional to 641,717.40, 961,409.70 and 392,107.80 is: 587,449.00
Step by Step Solution
- Step 1: Write the proportion equation
641,717.40 : 961,409.70 = 392,107.80 : x - Step 2: Convert to fraction form
641,717.40/961,409.70 = 392,107.80/x - Step 3: Cross multiply
641,717.40x = 961,409.70 × 392,107.80 - Step 4: Simplify right side
641,717.40x = 376,976,242,365.66 - Step 5: Solve for x
x = 376,976,242,365.66/641,717.40 - Step 6: Final answer
x = 587,449.00
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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.