Finding the Fourth Proportional to 261,211.80, 391,817.70 and 121,243.80
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Solution
The fourth proportional to 261,211.80, 391,817.70 and 121,243.80 is: 181,865.70
Step by Step Solution
- Step 1: Write the proportion equation
261,211.80 : 391,817.70 = 121,243.80 : x - Step 2: Convert to fraction form
261,211.80/391,817.70 = 121,243.80/x - Step 3: Cross multiply
261,211.80x = 391,817.70 × 121,243.80 - Step 4: Simplify right side
261,211.80x = 47,505,466,855.26 - Step 5: Solve for x
x = 47,505,466,855.26/261,211.80 - Step 6: Final answer
x = 181,865.70
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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.