Finding the Fourth Proportional to 678.78, 935.69 and 559.31
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Solution
The fourth proportional to 678.78, 935.69 and 559.31 is: 770.99
Step by Step Solution
- Step 1: Write the proportion equation
678.78 : 935.69 = 559.31 : x - Step 2: Convert to fraction form
678.78/935.69 = 559.31/x - Step 3: Cross multiply
678.78x = 935.69 × 559.31 - Step 4: Simplify right side
678.78x = 523,333.30 - Step 5: Solve for x
x = 523,333.30/678.78 - Step 6: Final answer
x = 770.99
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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.