Finding the Fourth Proportional to 378.79, 568.08 and 135.28
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Solution
The fourth proportional to 378.79, 568.08 and 135.28 is: 202.88
Step by Step Solution
- Step 1: Write the proportion equation
378.79 : 568.08 = 135.28 : x - Step 2: Convert to fraction form
378.79/568.08 = 135.28/x - Step 3: Cross multiply
378.79x = 568.08 × 135.28 - Step 4: Simplify right side
378.79x = 76,848.95 - Step 5: Solve for x
x = 76,848.95/378.79 - Step 6: Final answer
x = 202.88
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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.