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Finding the Fourth Proportional to 509.60, 764.31 and 144.31

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Solution

The fourth proportional to 509.60, 764.31 and 144.31 is: 216.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.60 : 764.31 = 144.31 : x
  2. Step 2: Convert to fraction form
    509.60/764.31 = 144.31/x
  3. Step 3: Cross multiply
    509.60x = 764.31 × 144.31
  4. Step 4: Simplify right side
    509.60x = 110,297.58
  5. Step 5: Solve for x
    x = 110,297.58/509.60
  6. Step 6: Final answer
    x = 216.44

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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.