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Finding the Fourth Proportional to 395.88, 546.54 and 276.42

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Solution

The fourth proportional to 395.88, 546.54 and 276.42 is: 381.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.88 : 546.54 = 276.42 : x
  2. Step 2: Convert to fraction form
    395.88/546.54 = 276.42/x
  3. Step 3: Cross multiply
    395.88x = 546.54 × 276.42
  4. Step 4: Simplify right side
    395.88x = 151,074.59
  5. Step 5: Solve for x
    x = 151,074.59/395.88
  6. Step 6: Final answer
    x = 381.62

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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.