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Finding the Fourth Proportional to 263.44, 395.28 and 215.68

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Solution

The fourth proportional to 263.44, 395.28 and 215.68 is: 323.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.44 : 395.28 = 215.68 : x
  2. Step 2: Convert to fraction form
    263.44/395.28 = 215.68/x
  3. Step 3: Cross multiply
    263.44x = 395.28 × 215.68
  4. Step 4: Simplify right side
    263.44x = 85,253.99
  5. Step 5: Solve for x
    x = 85,253.99/263.44
  6. Step 6: Final answer
    x = 323.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.