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Finding the Fourth Proportional to 426.67, 639.97 and 183.20

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Solution

The fourth proportional to 426.67, 639.97 and 183.20 is: 274.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.67 : 639.97 = 183.20 : x
  2. Step 2: Convert to fraction form
    426.67/639.97 = 183.20/x
  3. Step 3: Cross multiply
    426.67x = 639.97 × 183.20
  4. Step 4: Simplify right side
    426.67x = 117,238.85
  5. Step 5: Solve for x
    x = 117,238.85/426.67
  6. Step 6: Final answer
    x = 274.78

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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.