Finding the Fourth Proportional to 281,319.28, 421,977.60 and 115,107.28
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Solution
The fourth proportional to 281,319.28, 421,977.60 and 115,107.28 is: 172,660.38
Step by Step Solution
- Step 1: Write the proportion equation
281,319.28 : 421,977.60 = 115,107.28 : x - Step 2: Convert to fraction form
281,319.28/421,977.60 = 115,107.28/x - Step 3: Cross multiply
281,319.28x = 421,977.60 × 115,107.28 - Step 4: Simplify right side
281,319.28x = 48,572,693,756.93 - Step 5: Solve for x
x = 48,572,693,756.93/281,319.28 - Step 6: Final answer
x = 172,660.38
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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.