Finding the Fourth Proportional to 318,947,105.49, 440,147,302.20 and 172,269,389.49
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Solution
The fourth proportional to 318,947,105.49, 440,147,302.20 and 172,269,389.49 is: 237,731,917.71
Step by Step Solution
- Step 1: Write the proportion equation
318,947,105.49 : 440,147,302.20 = 172,269,389.49 : x - Step 2: Convert to fraction form
318,947,105.49/440,147,302.20 = 172,269,389.49/x - Step 3: Cross multiply
318,947,105.49x = 440,147,302.20 × 172,269,389.49 - Step 4: Simplify right side
318,947,105.49x = 75,823,907,035,664,544 - Step 5: Solve for x
x = 75,823,907,035,664,544/318,947,105.49 - Step 6: Final answer
x = 237,731,917.71
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.