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Finding the Fourth Proportional to 659.20, 993.56 and 629.92

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Solution

The fourth proportional to 659.20, 993.56 and 629.92 is: 949.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.20 : 993.56 = 629.92 : x
  2. Step 2: Convert to fraction form
    659.20/993.56 = 629.92/x
  3. Step 3: Cross multiply
    659.20x = 993.56 × 629.92
  4. Step 4: Simplify right side
    659.20x = 625,863.32
  5. Step 5: Solve for x
    x = 625,863.32/659.20
  6. Step 6: Final answer
    x = 949.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.