Finding the Fourth Proportional to 44.78, 66.72 and 39.99
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Solution
The fourth proportional to 44.78, 66.72 and 39.99 is: 59.58
Step by Step Solution
- Step 1: Write the proportion equation
44.78 : 66.72 = 39.99 : x - Step 2: Convert to fraction form
44.78/66.72 = 39.99/x - Step 3: Cross multiply
44.78x = 66.72 × 39.99 - Step 4: Simplify right side
44.78x = 2,668.13 - Step 5: Solve for x
x = 2,668.13/44.78 - Step 6: Final answer
x = 59.58
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.