Finding the Fourth Proportional to 66.31, 91.48 and 42.99
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Solution
The fourth proportional to 66.31, 91.48 and 42.99 is: 59.31
Step by Step Solution
- Step 1: Write the proportion equation
66.31 : 91.48 = 42.99 : x - Step 2: Convert to fraction form
66.31/91.48 = 42.99/x - Step 3: Cross multiply
66.31x = 91.48 × 42.99 - Step 4: Simplify right side
66.31x = 3,932.73 - Step 5: Solve for x
x = 3,932.73/66.31 - Step 6: Final answer
x = 59.31
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.