Finding the Fourth Proportional to 391,553.80, 587,330.70 and 312,821.80
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Solution
The fourth proportional to 391,553.80, 587,330.70 and 312,821.80 is: 469,232.70
Step by Step Solution
- Step 1: Write the proportion equation
391,553.80 : 587,330.70 = 312,821.80 : x - Step 2: Convert to fraction form
391,553.80/587,330.70 = 312,821.80/x - Step 3: Cross multiply
391,553.80x = 587,330.70 × 312,821.80 - Step 4: Simplify right side
391,553.80x = 183,729,846,769.26 - Step 5: Solve for x
x = 183,729,846,769.26/391,553.80 - Step 6: Final answer
x = 469,232.70
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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.