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Finding the Fourth Proportional to 617.28, 923.76 and 455.04

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Solution

The fourth proportional to 617.28, 923.76 and 455.04 is: 680.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.28 : 923.76 = 455.04 : x
  2. Step 2: Convert to fraction form
    617.28/923.76 = 455.04/x
  3. Step 3: Cross multiply
    617.28x = 923.76 × 455.04
  4. Step 4: Simplify right side
    617.28x = 420,347.75
  5. Step 5: Solve for x
    x = 420,347.75/617.28
  6. Step 6: Final answer
    x = 680.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.