Finding the Fourth Proportional to 678,438.36, 936,135.84 and 391,996.44
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Solution
The fourth proportional to 678,438.36, 936,135.84 and 391,996.44 is: 540,892.05
Step by Step Solution
- Step 1: Write the proportion equation
678,438.36 : 936,135.84 = 391,996.44 : x - Step 2: Convert to fraction form
678,438.36/936,135.84 = 391,996.44/x - Step 3: Cross multiply
678,438.36x = 936,135.84 × 391,996.44 - Step 4: Simplify right side
678,438.36x = 366,961,916,636.41 - Step 5: Solve for x
x = 366,961,916,636.41/678,438.36 - Step 6: Final answer
x = 540,892.05
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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.