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Finding the Fourth Proportional to 458.28, 632.22 and 396.09

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Solution

The fourth proportional to 458.28, 632.22 and 396.09 is: 546.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.28 : 632.22 = 396.09 : x
  2. Step 2: Convert to fraction form
    458.28/632.22 = 396.09/x
  3. Step 3: Cross multiply
    458.28x = 632.22 × 396.09
  4. Step 4: Simplify right side
    458.28x = 250,416.02
  5. Step 5: Solve for x
    x = 250,416.02/458.28
  6. Step 6: Final answer
    x = 546.43

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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.