Finding the Fourth Proportional to 641,716.40, 961,408.20 and 392,106.80
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Solution
The fourth proportional to 641,716.40, 961,408.20 and 392,106.80 is: 587,447.50
Step by Step Solution
- Step 1: Write the proportion equation
641,716.40 : 961,408.20 = 392,106.80 : x - Step 2: Convert to fraction form
641,716.40/961,408.20 = 392,106.80/x - Step 3: Cross multiply
641,716.40x = 961,408.20 × 392,106.80 - Step 4: Simplify right side
641,716.40x = 376,974,692,795.76 - Step 5: Solve for x
x = 376,974,692,795.76/641,716.40 - Step 6: Final answer
x = 587,447.50
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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.