Finding the Fourth Proportional to 391.91, 587.79 and 117.99
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Solution
The fourth proportional to 391.91, 587.79 and 117.99 is: 176.96
Step by Step Solution
- Step 1: Write the proportion equation
391.91 : 587.79 = 117.99 : x - Step 2: Convert to fraction form
391.91/587.79 = 117.99/x - Step 3: Cross multiply
391.91x = 587.79 × 117.99 - Step 4: Simplify right side
391.91x = 69,353.34 - Step 5: Solve for x
x = 69,353.34/391.91 - Step 6: Final answer
x = 176.96
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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.