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Finding the Fourth Proportional to 629.73, 943.80 and 321.70

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Solution

The fourth proportional to 629.73, 943.80 and 321.70 is: 482.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.73 : 943.80 = 321.70 : x
  2. Step 2: Convert to fraction form
    629.73/943.80 = 321.70/x
  3. Step 3: Cross multiply
    629.73x = 943.80 × 321.70
  4. Step 4: Simplify right side
    629.73x = 303,620.46
  5. Step 5: Solve for x
    x = 303,620.46/629.73
  6. Step 6: Final answer
    x = 482.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.