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Finding the Fourth Proportional to 629.88, 944.60 and 213.35

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Solution

The fourth proportional to 629.88, 944.60 and 213.35 is: 319.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.88 : 944.60 = 213.35 : x
  2. Step 2: Convert to fraction form
    629.88/944.60 = 213.35/x
  3. Step 3: Cross multiply
    629.88x = 944.60 × 213.35
  4. Step 4: Simplify right side
    629.88x = 201,526.17
  5. Step 5: Solve for x
    x = 201,526.17/629.88
  6. Step 6: Final answer
    x = 319.94

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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.