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Finding the Fourth Proportional to 629.40, 869.41 and 483.83

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Solution

The fourth proportional to 629.40, 869.41 and 483.83 is: 668.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.40 : 869.41 = 483.83 : x
  2. Step 2: Convert to fraction form
    629.40/869.41 = 483.83/x
  3. Step 3: Cross multiply
    629.40x = 869.41 × 483.83
  4. Step 4: Simplify right side
    629.40x = 420,646.64
  5. Step 5: Solve for x
    x = 420,646.64/629.40
  6. Step 6: Final answer
    x = 668.33

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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.