Finding the Fourth Proportional to 1,214,021.80, 1,821,032.70 and 415,037.80
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Solution
The fourth proportional to 1,214,021.80, 1,821,032.70 and 415,037.80 is: 622,556.70
Step by Step Solution
- Step 1: Write the proportion equation
1,214,021.80 : 1,821,032.70 = 415,037.80 : x - Step 2: Convert to fraction form
1,214,021.80/1,821,032.70 = 415,037.80/x - Step 3: Cross multiply
1,214,021.80x = 1,821,032.70 × 415,037.80 - Step 4: Simplify right side
1,214,021.80x = 755,797,405,536.06 - Step 5: Solve for x
x = 755,797,405,536.06/1,214,021.80 - Step 6: Final answer
x = 622,556.70
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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.