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Finding the Fourth Proportional to 355.70, 533.36 and 108.87

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Solution

The fourth proportional to 355.70, 533.36 and 108.87 is: 163.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.70 : 533.36 = 108.87 : x
  2. Step 2: Convert to fraction form
    355.70/533.36 = 108.87/x
  3. Step 3: Cross multiply
    355.70x = 533.36 × 108.87
  4. Step 4: Simplify right side
    355.70x = 58,066.90
  5. Step 5: Solve for x
    x = 58,066.90/355.70
  6. Step 6: Final answer
    x = 163.25

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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.