Finding the Fourth Proportional to 678.97, 1,018 and 611.26
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Solution
The fourth proportional to 678.97, 1,018 and 611.26 is: 916.48
Step by Step Solution
- Step 1: Write the proportion equation
678.97 : 1,018 = 611.26 : x - Step 2: Convert to fraction form
678.97/1,018 = 611.26/x - Step 3: Cross multiply
678.97x = 1,018 × 611.26 - Step 4: Simplify right side
678.97x = 622,262.68 - Step 5: Solve for x
x = 622,262.68/678.97 - Step 6: Final answer
x = 916.48
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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.