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Finding the Fourth Proportional to 654.16, 903.20 and 455.44

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Solution

The fourth proportional to 654.16, 903.20 and 455.44 is: 628.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.16 : 903.20 = 455.44 : x
  2. Step 2: Convert to fraction form
    654.16/903.20 = 455.44/x
  3. Step 3: Cross multiply
    654.16x = 903.20 × 455.44
  4. Step 4: Simplify right side
    654.16x = 411,353.41
  5. Step 5: Solve for x
    x = 411,353.41/654.16
  6. Step 6: Final answer
    x = 628.83

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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.