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Finding the Fourth Proportional to 355.15, 533.04 and 190.75

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Solution

The fourth proportional to 355.15, 533.04 and 190.75 is: 286.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.15 : 533.04 = 190.75 : x
  2. Step 2: Convert to fraction form
    355.15/533.04 = 190.75/x
  3. Step 3: Cross multiply
    355.15x = 533.04 × 190.75
  4. Step 4: Simplify right side
    355.15x = 101,677.38
  5. Step 5: Solve for x
    x = 101,677.38/355.15
  6. Step 6: Final answer
    x = 286.29

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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.