Finding the Fourth Proportional to 280,243.21, 420,353.05 and 130,431.97
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Solution
The fourth proportional to 280,243.21, 420,353.05 and 130,431.97 is: 195,642.47
Step by Step Solution
- Step 1: Write the proportion equation
280,243.21 : 420,353.05 = 130,431.97 : x - Step 2: Convert to fraction form
280,243.21/420,353.05 = 130,431.97/x - Step 3: Cross multiply
280,243.21x = 420,353.05 × 130,431.97 - Step 4: Simplify right side
280,243.21x = 54,827,473,979.16 - Step 5: Solve for x
x = 54,827,473,979.16/280,243.21 - Step 6: Final answer
x = 195,642.47
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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.