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Finding the Fourth Proportional to 395.63, 546.19 and 255.95

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Solution

The fourth proportional to 395.63, 546.19 and 255.95 is: 353.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.63 : 546.19 = 255.95 : x
  2. Step 2: Convert to fraction form
    395.63/546.19 = 255.95/x
  3. Step 3: Cross multiply
    395.63x = 546.19 × 255.95
  4. Step 4: Simplify right side
    395.63x = 139,793.96
  5. Step 5: Solve for x
    x = 139,793.96/395.63
  6. Step 6: Final answer
    x = 353.35

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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.