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Finding the Fourth Proportional to 629.28, 942.72 and 434.39

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Solution

The fourth proportional to 629.28, 942.72 and 434.39 is: 650.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.28 : 942.72 = 434.39 : x
  2. Step 2: Convert to fraction form
    629.28/942.72 = 434.39/x
  3. Step 3: Cross multiply
    629.28x = 942.72 × 434.39
  4. Step 4: Simplify right side
    629.28x = 409,508.14
  5. Step 5: Solve for x
    x = 409,508.14/629.28
  6. Step 6: Final answer
    x = 650.76

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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.