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Finding the Fourth Proportional to 395.20, 547.92 and 372.16

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Solution

The fourth proportional to 395.20, 547.92 and 372.16 is: 515.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.20 : 547.92 = 372.16 : x
  2. Step 2: Convert to fraction form
    395.20/547.92 = 372.16/x
  3. Step 3: Cross multiply
    395.20x = 547.92 × 372.16
  4. Step 4: Simplify right side
    395.20x = 203,913.91
  5. Step 5: Solve for x
    x = 203,913.91/395.20
  6. Step 6: Final answer
    x = 515.98

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.