Finding the Fourth Proportional to 387,857.31, 581,786.01 and 121,641.09
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Solution
The fourth proportional to 387,857.31, 581,786.01 and 121,641.09 is: 182,461.65
Step by Step Solution
- Step 1: Write the proportion equation
387,857.31 : 581,786.01 = 121,641.09 : x - Step 2: Convert to fraction form
387,857.31/581,786.01 = 121,641.09/x - Step 3: Cross multiply
387,857.31x = 581,786.01 × 121,641.09 - Step 4: Simplify right side
387,857.31x = 70,769,084,403.15 - Step 5: Solve for x
x = 70,769,084,403.15/387,857.31 - Step 6: Final answer
x = 182,461.65
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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.