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Finding the Fourth Proportional to 629.88, 869.23 and 367.89

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Solution

The fourth proportional to 629.88, 869.23 and 367.89 is: 507.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.88 : 869.23 = 367.89 : x
  2. Step 2: Convert to fraction form
    629.88/869.23 = 367.89/x
  3. Step 3: Cross multiply
    629.88x = 869.23 × 367.89
  4. Step 4: Simplify right side
    629.88x = 319,781.02
  5. Step 5: Solve for x
    x = 319,781.02/629.88
  6. Step 6: Final answer
    x = 507.69

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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.