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Finding the Fourth Proportional to 629.33, 867.86 and 377.21

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Solution

The fourth proportional to 629.33, 867.86 and 377.21 is: 520.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.33 : 867.86 = 377.21 : x
  2. Step 2: Convert to fraction form
    629.33/867.86 = 377.21/x
  3. Step 3: Cross multiply
    629.33x = 867.86 × 377.21
  4. Step 4: Simplify right side
    629.33x = 327,365.47
  5. Step 5: Solve for x
    x = 327,365.47/629.33
  6. Step 6: Final answer
    x = 520.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.