Finding the Fourth Proportional to 319.20, 479.10 and 156.99
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Solution
The fourth proportional to 319.20, 479.10 and 156.99 is: 235.63
Step by Step Solution
- Step 1: Write the proportion equation
319.20 : 479.10 = 156.99 : x - Step 2: Convert to fraction form
319.20/479.10 = 156.99/x - Step 3: Cross multiply
319.20x = 479.10 × 156.99 - Step 4: Simplify right side
319.20x = 75,213.91 - Step 5: Solve for x
x = 75,213.91/319.20 - Step 6: Final answer
x = 235.63
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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.