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Finding the Fourth Proportional to 321.36, 443.14 and 251.30

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Solution

The fourth proportional to 321.36, 443.14 and 251.30 is: 346.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.36 : 443.14 = 251.30 : x
  2. Step 2: Convert to fraction form
    321.36/443.14 = 251.30/x
  3. Step 3: Cross multiply
    321.36x = 443.14 × 251.30
  4. Step 4: Simplify right side
    321.36x = 111,361.08
  5. Step 5: Solve for x
    x = 111,361.08/321.36
  6. Step 6: Final answer
    x = 346.53

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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.