Finding the Fourth Proportional to 1,987,997.70, 2,981,996.55 and 492,089.70
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Solution
The fourth proportional to 1,987,997.70, 2,981,996.55 and 492,089.70 is: 738,134.55
Step by Step Solution
- Step 1: Write the proportion equation
1,987,997.70 : 2,981,996.55 = 492,089.70 : x - Step 2: Convert to fraction form
1,987,997.70/2,981,996.55 = 492,089.70/x - Step 3: Cross multiply
1,987,997.70x = 2,981,996.55 × 492,089.70 - Step 4: Simplify right side
1,987,997.70x = 1,467,409,787,690.54 - Step 5: Solve for x
x = 1,467,409,787,690.54/1,987,997.70 - Step 6: Final answer
x = 738,134.55
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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.