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Finding the Fourth Proportional to 395.66, 546.26 and 255.84

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Solution

The fourth proportional to 395.66, 546.26 and 255.84 is: 353.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.66 : 546.26 = 255.84 : x
  2. Step 2: Convert to fraction form
    395.66/546.26 = 255.84/x
  3. Step 3: Cross multiply
    395.66x = 546.26 × 255.84
  4. Step 4: Simplify right side
    395.66x = 139,755.16
  5. Step 5: Solve for x
    x = 139,755.16/395.66
  6. Step 6: Final answer
    x = 353.22

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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.