Finding the Fourth Proportional to 1,286,391.24, 1,929,865.50 and 387,757.80
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Solution
The fourth proportional to 1,286,391.24, 1,929,865.50 and 387,757.80 is: 581,720.69
Step by Step Solution
- Step 1: Write the proportion equation
1,286,391.24 : 1,929,865.50 = 387,757.80 : x - Step 2: Convert to fraction form
1,286,391.24/1,929,865.50 = 387,757.80/x - Step 3: Cross multiply
1,286,391.24x = 1,929,865.50 × 387,757.80 - Step 4: Simplify right side
1,286,391.24x = 748,320,400,575.90 - Step 5: Solve for x
x = 748,320,400,575.90/1,286,391.24 - Step 6: Final answer
x = 581,720.69
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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.