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Finding the Fourth Proportional to 617.68, 926.96 and 455.80

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Solution

The fourth proportional to 617.68, 926.96 and 455.80 is: 684.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.68 : 926.96 = 455.80 : x
  2. Step 2: Convert to fraction form
    617.68/926.96 = 455.80/x
  3. Step 3: Cross multiply
    617.68x = 926.96 × 455.80
  4. Step 4: Simplify right side
    617.68x = 422,508.37
  5. Step 5: Solve for x
    x = 422,508.37/617.68
  6. Step 6: Final answer
    x = 684.02

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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.