Finding the Fourth Proportional to 99.49, 149.28 and 38.65
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Solution
The fourth proportional to 99.49, 149.28 and 38.65 is: 57.99
Step by Step Solution
- Step 1: Write the proportion equation
99.49 : 149.28 = 38.65 : x - Step 2: Convert to fraction form
99.49/149.28 = 38.65/x - Step 3: Cross multiply
99.49x = 149.28 × 38.65 - Step 4: Simplify right side
99.49x = 5,769.67 - Step 5: Solve for x
x = 5,769.67/99.49 - Step 6: Final answer
x = 57.99
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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.