Finding the Fourth Proportional to 431,183.21, 646,869.48 and 127,553.60
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Solution
The fourth proportional to 431,183.21, 646,869.48 and 127,553.60 is: 191,358.40
Step by Step Solution
- Step 1: Write the proportion equation
431,183.21 : 646,869.48 = 127,553.60 : x - Step 2: Convert to fraction form
431,183.21/646,869.48 = 127,553.60/x - Step 3: Cross multiply
431,183.21x = 646,869.48 × 127,553.60 - Step 4: Simplify right side
431,183.21x = 82,510,530,904.13 - Step 5: Solve for x
x = 82,510,530,904.13/431,183.21 - Step 6: Final answer
x = 191,358.40
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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.