Finding the Fourth Proportional to 491,645.55, 678,489.78 and 284,921.03
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Solution
The fourth proportional to 491,645.55, 678,489.78 and 284,921.03 is: 393,201.99
Step by Step Solution
- Step 1: Write the proportion equation
491,645.55 : 678,489.78 = 284,921.03 : x - Step 2: Convert to fraction form
491,645.55/678,489.78 = 284,921.03/x - Step 3: Cross multiply
491,645.55x = 678,489.78 × 284,921.03 - Step 4: Simplify right side
491,645.55x = 193,316,005,910.25 - Step 5: Solve for x
x = 193,316,005,910.25/491,645.55 - Step 6: Final answer
x = 393,201.99
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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.