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Finding the Fourth Proportional to 481.30, 664.28 and 284.80

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Solution

The fourth proportional to 481.30, 664.28 and 284.80 is: 393.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.30 : 664.28 = 284.80 : x
  2. Step 2: Convert to fraction form
    481.30/664.28 = 284.80/x
  3. Step 3: Cross multiply
    481.30x = 664.28 × 284.80
  4. Step 4: Simplify right side
    481.30x = 189,186.94
  5. Step 5: Solve for x
    x = 189,186.94/481.30
  6. Step 6: Final answer
    x = 393.07

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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.