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Finding the Fourth Proportional to 617.55, 926.79 and 456.36

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Solution

The fourth proportional to 617.55, 926.79 and 456.36 is: 684.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.55 : 926.79 = 456.36 : x
  2. Step 2: Convert to fraction form
    617.55/926.79 = 456.36/x
  3. Step 3: Cross multiply
    617.55x = 926.79 × 456.36
  4. Step 4: Simplify right side
    617.55x = 422,949.88
  5. Step 5: Solve for x
    x = 422,949.88/617.55
  6. Step 6: Final answer
    x = 684.88

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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.