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Finding the Fourth Proportional to 509.50, 764 and 216.96

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Solution

The fourth proportional to 509.50, 764 and 216.96 is: 325.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.50 : 764 = 216.96 : x
  2. Step 2: Convert to fraction form
    509.50/764 = 216.96/x
  3. Step 3: Cross multiply
    509.50x = 764 × 216.96
  4. Step 4: Simplify right side
    509.50x = 165,757.44
  5. Step 5: Solve for x
    x = 165,757.44/509.50
  6. Step 6: Final answer
    x = 325.33

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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.