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Finding the Fourth Proportional to 666.64, 993.25 and 629.38

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Solution

The fourth proportional to 666.64, 993.25 and 629.38 is: 937.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.64 : 993.25 = 629.38 : x
  2. Step 2: Convert to fraction form
    666.64/993.25 = 629.38/x
  3. Step 3: Cross multiply
    666.64x = 993.25 × 629.38
  4. Step 4: Simplify right side
    666.64x = 625,126.72
  5. Step 5: Solve for x
    x = 625,126.72/666.64
  6. Step 6: Final answer
    x = 937.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.