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Finding the Fourth Proportional to 617.28, 926.72 and 292.80

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Solution

The fourth proportional to 617.28, 926.72 and 292.80 is: 439.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.28 : 926.72 = 292.80 : x
  2. Step 2: Convert to fraction form
    617.28/926.72 = 292.80/x
  3. Step 3: Cross multiply
    617.28x = 926.72 × 292.80
  4. Step 4: Simplify right side
    617.28x = 271,343.62
  5. Step 5: Solve for x
    x = 271,343.62/617.28
  6. Step 6: Final answer
    x = 439.58

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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.