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Finding the Fourth Proportional to 355.43, 533.23 and 108.65

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Solution

The fourth proportional to 355.43, 533.23 and 108.65 is: 162.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.43 : 533.23 = 108.65 : x
  2. Step 2: Convert to fraction form
    355.43/533.23 = 108.65/x
  3. Step 3: Cross multiply
    355.43x = 533.23 × 108.65
  4. Step 4: Simplify right side
    355.43x = 57,932.23
  5. Step 5: Solve for x
    x = 57,932.23/355.43
  6. Step 6: Final answer
    x = 162.99

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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.