Finding the Fourth Proportional to 290,786.31, 436,178.97 and 91,122.03
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Solution
The fourth proportional to 290,786.31, 436,178.97 and 91,122.03 is: 136,682.89
Step by Step Solution
- Step 1: Write the proportion equation
290,786.31 : 436,178.97 = 91,122.03 : x - Step 2: Convert to fraction form
290,786.31/436,178.97 = 91,122.03/x - Step 3: Cross multiply
290,786.31x = 436,178.97 × 91,122.03 - Step 4: Simplify right side
290,786.31x = 39,745,513,189.71 - Step 5: Solve for x
x = 39,745,513,189.71/290,786.31 - Step 6: Final answer
x = 136,682.89
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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.