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Finding the Fourth Proportional to 629.74, 944.62 and 320.72

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Solution

The fourth proportional to 629.74, 944.62 and 320.72 is: 481.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.74 : 944.62 = 320.72 : x
  2. Step 2: Convert to fraction form
    629.74/944.62 = 320.72/x
  3. Step 3: Cross multiply
    629.74x = 944.62 × 320.72
  4. Step 4: Simplify right side
    629.74x = 302,958.53
  5. Step 5: Solve for x
    x = 302,958.53/629.74
  6. Step 6: Final answer
    x = 481.09

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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.