Finding the Fourth Proportional to 1,261,391.58, 1,740,694.50 and 688,431.60
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Solution
The fourth proportional to 1,261,391.58, 1,740,694.50 and 688,431.60 is: 950,021.48
Step by Step Solution
- Step 1: Write the proportion equation
1,261,391.58 : 1,740,694.50 = 688,431.60 : x - Step 2: Convert to fraction form
1,261,391.58/1,740,694.50 = 688,431.60/x - Step 3: Cross multiply
1,261,391.58x = 1,740,694.50 × 688,431.60 - Step 4: Simplify right side
1,261,391.58x = 1,198,349,099,746.20 - Step 5: Solve for x
x = 1,198,349,099,746.20/1,261,391.58 - Step 6: Final answer
x = 950,021.48
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.