Finding the Fourth Proportional to 385,295,905.98, 531,708,713.91 and 220,286,930.94
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Solution
The fourth proportional to 385,295,905.98, 531,708,713.91 and 220,286,930.94 is: 303,996,172.61
Step by Step Solution
- Step 1: Write the proportion equation
385,295,905.98 : 531,708,713.91 = 220,286,930.94 : x - Step 2: Convert to fraction form
385,295,905.98/531,708,713.91 = 220,286,930.94/x - Step 3: Cross multiply
385,295,905.98x = 531,708,713.91 × 220,286,930.94 - Step 4: Simplify right side
385,295,905.98x = 117,128,480,741,288,384 - Step 5: Solve for x
x = 117,128,480,741,288,384/385,295,905.98 - Step 6: Final answer
x = 303,996,172.61
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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.