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Finding the Fourth Proportional to 485.28, 665.92 and 441.28

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Solution

The fourth proportional to 485.28, 665.92 and 441.28 is: 605.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.28 : 665.92 = 441.28 : x
  2. Step 2: Convert to fraction form
    485.28/665.92 = 441.28/x
  3. Step 3: Cross multiply
    485.28x = 665.92 × 441.28
  4. Step 4: Simplify right side
    485.28x = 293,857.18
  5. Step 5: Solve for x
    x = 293,857.18/485.28
  6. Step 6: Final answer
    x = 605.54

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These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.