Finding the Fourth Proportional to 812,387.50, 1,121,157.87 and 449,845.09
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Solution
The fourth proportional to 812,387.50, 1,121,157.87 and 449,845.09 is: 620,821.17
Step by Step Solution
- Step 1: Write the proportion equation
812,387.50 : 1,121,157.87 = 449,845.09 : x - Step 2: Convert to fraction form
812,387.50/1,121,157.87 = 449,845.09/x - Step 3: Cross multiply
812,387.50x = 1,121,157.87 × 449,845.09 - Step 4: Simplify right side
812,387.50x = 504,347,358,444.55 - Step 5: Solve for x
x = 504,347,358,444.55/812,387.50 - Step 6: Final answer
x = 620,821.17
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.