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Finding the Fourth Proportional to 629.98, 943.21 and 321.16

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Solution

The fourth proportional to 629.98, 943.21 and 321.16 is: 480.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.98 : 943.21 = 321.16 : x
  2. Step 2: Convert to fraction form
    629.98/943.21 = 321.16/x
  3. Step 3: Cross multiply
    629.98x = 943.21 × 321.16
  4. Step 4: Simplify right side
    629.98x = 302,921.32
  5. Step 5: Solve for x
    x = 302,921.32/629.98
  6. Step 6: Final answer
    x = 480.84

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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.