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Finding the Fourth Proportional to 351.06, 484.56 and 321.30

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Solution

The fourth proportional to 351.06, 484.56 and 321.30 is: 443.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.06 : 484.56 = 321.30 : x
  2. Step 2: Convert to fraction form
    351.06/484.56 = 321.30/x
  3. Step 3: Cross multiply
    351.06x = 484.56 × 321.30
  4. Step 4: Simplify right side
    351.06x = 155,689.13
  5. Step 5: Solve for x
    x = 155,689.13/351.06
  6. Step 6: Final answer
    x = 443.48

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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.