Finding the Fourth Proportional to 1,383,749.12, 1,909,576.32 and 780,135.68
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Solution
The fourth proportional to 1,383,749.12, 1,909,576.32 and 780,135.68 is: 1,076,588.67
Step by Step Solution
- Step 1: Write the proportion equation
1,383,749.12 : 1,909,576.32 = 780,135.68 : x - Step 2: Convert to fraction form
1,383,749.12/1,909,576.32 = 780,135.68/x - Step 3: Cross multiply
1,383,749.12x = 1,909,576.32 × 780,135.68 - Step 4: Simplify right side
1,383,749.12x = 1,489,728,620,915.10 - Step 5: Solve for x
x = 1,489,728,620,915.10/1,383,749.12 - Step 6: Final answer
x = 1,076,588.67
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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.