Finding the Fourth Proportional to 686,118.12, 1,029,127.74 and 212,791.18
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Solution
The fourth proportional to 686,118.12, 1,029,127.74 and 212,791.18 is: 319,171.44
Step by Step Solution
- Step 1: Write the proportion equation
686,118.12 : 1,029,127.74 = 212,791.18 : x - Step 2: Convert to fraction form
686,118.12/1,029,127.74 = 212,791.18/x - Step 3: Cross multiply
686,118.12x = 1,029,127.74 × 212,791.18 - Step 4: Simplify right side
686,118.12x = 218,989,306,165.33 - Step 5: Solve for x
x = 218,989,306,165.33/686,118.12 - Step 6: Final answer
x = 319,171.44
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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.