Finding the Fourth Proportional to 644.57, 966.99 and 211.70
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Solution
The fourth proportional to 644.57, 966.99 and 211.70 is: 317.59
Step by Step Solution
- Step 1: Write the proportion equation
644.57 : 966.99 = 211.70 : x - Step 2: Convert to fraction form
644.57/966.99 = 211.70/x - Step 3: Cross multiply
644.57x = 966.99 × 211.70 - Step 4: Simplify right side
644.57x = 204,706.95 - Step 5: Solve for x
x = 204,706.95/644.57 - Step 6: Final answer
x = 317.59
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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.