Finding the Fourth Proportional to 208.88, 313.36 and 87.20
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Solution
The fourth proportional to 208.88, 313.36 and 87.20 is: 130.82
Step by Step Solution
- Step 1: Write the proportion equation
208.88 : 313.36 = 87.20 : x - Step 2: Convert to fraction form
208.88/313.36 = 87.20/x - Step 3: Cross multiply
208.88x = 313.36 × 87.20 - Step 4: Simplify right side
208.88x = 27,324.99 - Step 5: Solve for x
x = 27,324.99/208.88 - Step 6: Final answer
x = 130.82
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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.