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Finding the Fourth Proportional to 629.54, 869.57 and 483.98

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Solution

The fourth proportional to 629.54, 869.57 and 483.98 is: 668.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.54 : 869.57 = 483.98 : x
  2. Step 2: Convert to fraction form
    629.54/869.57 = 483.98/x
  3. Step 3: Cross multiply
    629.54x = 869.57 × 483.98
  4. Step 4: Simplify right side
    629.54x = 420,849.54
  5. Step 5: Solve for x
    x = 420,849.54/629.54
  6. Step 6: Final answer
    x = 668.50

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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.