Finding the Fourth Proportional to 319.20, 478.95 and 156.99
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Solution
The fourth proportional to 319.20, 478.95 and 156.99 is: 235.56
Step by Step Solution
- Step 1: Write the proportion equation
319.20 : 478.95 = 156.99 : x - Step 2: Convert to fraction form
319.20/478.95 = 156.99/x - Step 3: Cross multiply
319.20x = 478.95 × 156.99 - Step 4: Simplify right side
319.20x = 75,190.36 - Step 5: Solve for x
x = 75,190.36/319.20 - Step 6: Final answer
x = 235.56
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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.