Finding the Fourth Proportional to 387,842.31, 581,763.51 and 121,626.09
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Solution
The fourth proportional to 387,842.31, 581,763.51 and 121,626.09 is: 182,439.15
Step by Step Solution
- Step 1: Write the proportion equation
387,842.31 : 581,763.51 = 121,626.09 : x - Step 2: Convert to fraction form
387,842.31/581,763.51 = 121,626.09/x - Step 3: Cross multiply
387,842.31x = 581,763.51 × 121,626.09 - Step 4: Simplify right side
387,842.31x = 70,757,621,025.98 - Step 5: Solve for x
x = 70,757,621,025.98/387,842.31 - Step 6: Final answer
x = 182,439.15
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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.