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Finding the Fourth Proportional to 666.76, 993.44 and 629.50

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Solution

The fourth proportional to 666.76, 993.44 and 629.50 is: 937.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.76 : 993.44 = 629.50 : x
  2. Step 2: Convert to fraction form
    666.76/993.44 = 629.50/x
  3. Step 3: Cross multiply
    666.76x = 993.44 × 629.50
  4. Step 4: Simplify right side
    666.76x = 625,370.48
  5. Step 5: Solve for x
    x = 625,370.48/666.76
  6. Step 6: Final answer
    x = 937.92

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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.