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Finding the Fourth Proportional to 355.99, 533.78 and 191.65

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Solution

The fourth proportional to 355.99, 533.78 and 191.65 is: 287.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.99 : 533.78 = 191.65 : x
  2. Step 2: Convert to fraction form
    355.99/533.78 = 191.65/x
  3. Step 3: Cross multiply
    355.99x = 533.78 × 191.65
  4. Step 4: Simplify right side
    355.99x = 102,299.42
  5. Step 5: Solve for x
    x = 102,299.42/355.99
  6. Step 6: Final answer
    x = 287.37

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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.