Finding the Fourth Proportional to 319.95, 479.99 and 157.68
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Solution
The fourth proportional to 319.95, 479.99 and 157.68 is: 236.55
Step by Step Solution
- Step 1: Write the proportion equation
319.95 : 479.99 = 157.68 : x - Step 2: Convert to fraction form
319.95/479.99 = 157.68/x - Step 3: Cross multiply
319.95x = 479.99 × 157.68 - Step 4: Simplify right side
319.95x = 75,685.22 - Step 5: Solve for x
x = 75,685.22/319.95 - Step 6: Final answer
x = 236.55
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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.