Finding the Fourth Proportional to 1,387,107.75, 2,080,661.63 and 389,835.75
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Solution
The fourth proportional to 1,387,107.75, 2,080,661.63 and 389,835.75 is: 584,753.63
Step by Step Solution
- Step 1: Write the proportion equation
1,387,107.75 : 2,080,661.63 = 389,835.75 : x - Step 2: Convert to fraction form
1,387,107.75/2,080,661.63 = 389,835.75/x - Step 3: Cross multiply
1,387,107.75x = 2,080,661.63 × 389,835.75 - Step 4: Simplify right side
1,387,107.75x = 811,116,287,027.27 - Step 5: Solve for x
x = 811,116,287,027.27/1,387,107.75 - Step 6: Final answer
x = 584,753.63
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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.