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Finding the Fourth Proportional to 629.81, 942.72 and 355.09

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Solution

The fourth proportional to 629.81, 942.72 and 355.09 is: 531.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.81 : 942.72 = 355.09 : x
  2. Step 2: Convert to fraction form
    629.81/942.72 = 355.09/x
  3. Step 3: Cross multiply
    629.81x = 942.72 × 355.09
  4. Step 4: Simplify right side
    629.81x = 334,745.73
  5. Step 5: Solve for x
    x = 334,745.73/629.81
  6. Step 6: Final answer
    x = 531.50

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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.