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Finding the Fourth Proportional to 262.55, 393.87 and 108.56

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Solution

The fourth proportional to 262.55, 393.87 and 108.56 is: 162.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.55 : 393.87 = 108.56 : x
  2. Step 2: Convert to fraction form
    262.55/393.87 = 108.56/x
  3. Step 3: Cross multiply
    262.55x = 393.87 × 108.56
  4. Step 4: Simplify right side
    262.55x = 42,758.53
  5. Step 5: Solve for x
    x = 42,758.53/262.55
  6. Step 6: Final answer
    x = 162.86

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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.