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Finding the Fourth Proportional to 395.08, 544.64 and 276.88

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Solution

The fourth proportional to 395.08, 544.64 and 276.88 is: 381.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.08 : 544.64 = 276.88 : x
  2. Step 2: Convert to fraction form
    395.08/544.64 = 276.88/x
  3. Step 3: Cross multiply
    395.08x = 544.64 × 276.88
  4. Step 4: Simplify right side
    395.08x = 150,799.92
  5. Step 5: Solve for x
    x = 150,799.92/395.08
  6. Step 6: Final answer
    x = 381.69

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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.