Finding the Fourth Proportional to 391.13, 586.70 and 147.77
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Solution
The fourth proportional to 391.13, 586.70 and 147.77 is: 221.65
Step by Step Solution
- Step 1: Write the proportion equation
391.13 : 586.70 = 147.77 : x - Step 2: Convert to fraction form
391.13/586.70 = 147.77/x - Step 3: Cross multiply
391.13x = 586.70 × 147.77 - Step 4: Simplify right side
391.13x = 86,692.99 - Step 5: Solve for x
x = 86,692.99/391.13 - Step 6: Final answer
x = 221.65
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.