Finding the Fourth Proportional to 687,161.48, 1,031,144.18 and 287,768.70
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Solution
The fourth proportional to 687,161.48, 1,031,144.18 and 287,768.70 is: 431,821.38
Step by Step Solution
- Step 1: Write the proportion equation
687,161.48 : 1,031,144.18 = 287,768.70 : x - Step 2: Convert to fraction form
687,161.48/1,031,144.18 = 287,768.70/x - Step 3: Cross multiply
687,161.48x = 1,031,144.18 × 287,768.70 - Step 4: Simplify right side
687,161.48x = 296,731,018,752.32 - Step 5: Solve for x
x = 296,731,018,752.32/687,161.48 - Step 6: Final answer
x = 431,821.38
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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.