Finding the Fourth Proportional to 428,201.38, 642,277.36 and 128,675.53
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Solution
The fourth proportional to 428,201.38, 642,277.36 and 128,675.53 is: 193,005.86
Step by Step Solution
- Step 1: Write the proportion equation
428,201.38 : 642,277.36 = 128,675.53 : x - Step 2: Convert to fraction form
428,201.38/642,277.36 = 128,675.53/x - Step 3: Cross multiply
428,201.38x = 642,277.36 × 128,675.53 - Step 4: Simplify right side
428,201.38x = 82,645,375,850.24 - Step 5: Solve for x
x = 82,645,375,850.24/428,201.38 - Step 6: Final answer
x = 193,005.86
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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.