Finding the Fourth Proportional to 278,542.14, 417,745.86 and 128,638.26
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Solution
The fourth proportional to 278,542.14, 417,745.86 and 128,638.26 is: 192,926.29
Step by Step Solution
- Step 1: Write the proportion equation
278,542.14 : 417,745.86 = 128,638.26 : x - Step 2: Convert to fraction form
278,542.14/417,745.86 = 128,638.26/x - Step 3: Cross multiply
278,542.14x = 417,745.86 × 128,638.26 - Step 4: Simplify right side
278,542.14x = 53,738,100,552.60 - Step 5: Solve for x
x = 53,738,100,552.60/278,542.14 - Step 6: Final answer
x = 192,926.29
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1.5x scale
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.