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Finding the Fourth Proportional to 355.35, 533.09 and 111.82

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Solution

The fourth proportional to 355.35, 533.09 and 111.82 is: 167.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.35 : 533.09 = 111.82 : x
  2. Step 2: Convert to fraction form
    355.35/533.09 = 111.82/x
  3. Step 3: Cross multiply
    355.35x = 533.09 × 111.82
  4. Step 4: Simplify right side
    355.35x = 59,610.12
  5. Step 5: Solve for x
    x = 59,610.12/355.35
  6. Step 6: Final answer
    x = 167.75

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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.