Finding the Fourth Proportional to 428,394.36, 641,890.44 and 259,402.80
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Solution
The fourth proportional to 428,394.36, 641,890.44 and 259,402.80 is: 388,679.67
Step by Step Solution
- Step 1: Write the proportion equation
428,394.36 : 641,890.44 = 259,402.80 : x - Step 2: Convert to fraction form
428,394.36/641,890.44 = 259,402.80/x - Step 3: Cross multiply
428,394.36x = 641,890.44 × 259,402.80 - Step 4: Simplify right side
428,394.36x = 166,508,177,429.23 - Step 5: Solve for x
x = 166,508,177,429.23/428,394.36 - Step 6: Final answer
x = 388,679.67
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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.