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Finding the Fourth Proportional to 629.88, 869.24 and 367.90

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Solution

The fourth proportional to 629.88, 869.24 and 367.90 is: 507.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.88 : 869.24 = 367.90 : x
  2. Step 2: Convert to fraction form
    629.88/869.24 = 367.90/x
  3. Step 3: Cross multiply
    629.88x = 869.24 × 367.90
  4. Step 4: Simplify right side
    629.88x = 319,793.40
  5. Step 5: Solve for x
    x = 319,793.40/629.88
  6. Step 6: Final answer
    x = 507.71

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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.