Finding the Fourth Proportional to 638.78, 958.26 and 205.84
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Solution
The fourth proportional to 638.78, 958.26 and 205.84 is: 308.79
Step by Step Solution
- Step 1: Write the proportion equation
638.78 : 958.26 = 205.84 : x - Step 2: Convert to fraction form
638.78/958.26 = 205.84/x - Step 3: Cross multiply
638.78x = 958.26 × 205.84 - Step 4: Simplify right side
638.78x = 197,248.24 - Step 5: Solve for x
x = 197,248.24/638.78 - Step 6: Final answer
x = 308.79
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.