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Finding the Fourth Proportional to 509.29, 764.07 and 216.80

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Solution

The fourth proportional to 509.29, 764.07 and 216.80 is: 325.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.29 : 764.07 = 216.80 : x
  2. Step 2: Convert to fraction form
    509.29/764.07 = 216.80/x
  3. Step 3: Cross multiply
    509.29x = 764.07 × 216.80
  4. Step 4: Simplify right side
    509.29x = 165,650.38
  5. Step 5: Solve for x
    x = 165,650.38/509.29
  6. Step 6: Final answer
    x = 325.26

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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.