Finding the Fourth Proportional to 644.14, 889.14 and 395.88
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Solution
The fourth proportional to 644.14, 889.14 and 395.88 is: 546.45
Step by Step Solution
- Step 1: Write the proportion equation
644.14 : 889.14 = 395.88 : x - Step 2: Convert to fraction form
644.14/889.14 = 395.88/x - Step 3: Cross multiply
644.14x = 889.14 × 395.88 - Step 4: Simplify right side
644.14x = 351,992.74 - Step 5: Solve for x
x = 351,992.74/644.14 - Step 6: Final answer
x = 546.45
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.