Finding the Fourth Proportional to 319.11, 478.66 and 87.99
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Solution
The fourth proportional to 319.11, 478.66 and 87.99 is: 131.99
Step by Step Solution
- Step 1: Write the proportion equation
319.11 : 478.66 = 87.99 : x - Step 2: Convert to fraction form
319.11/478.66 = 87.99/x - Step 3: Cross multiply
319.11x = 478.66 × 87.99 - Step 4: Simplify right side
319.11x = 42,117.87 - Step 5: Solve for x
x = 42,117.87/319.11 - Step 6: Final answer
x = 131.99
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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.