Finding the Fourth Proportional to 391.19, 587.03 and 147.74
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Solution
The fourth proportional to 391.19, 587.03 and 147.74 is: 221.70
Step by Step Solution
- Step 1: Write the proportion equation
391.19 : 587.03 = 147.74 : x - Step 2: Convert to fraction form
391.19/587.03 = 147.74/x - Step 3: Cross multiply
391.19x = 587.03 × 147.74 - Step 4: Simplify right side
391.19x = 86,724.14 - Step 5: Solve for x
x = 86,724.14/391.19 - Step 6: Final answer
x = 221.70
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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.