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Finding the Fourth Proportional to 426.00, 639.01 and 133.49

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Solution

The fourth proportional to 426.00, 639.01 and 133.49 is: 200.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.00 : 639.01 = 133.49 : x
  2. Step 2: Convert to fraction form
    426.00/639.01 = 133.49/x
  3. Step 3: Cross multiply
    426.00x = 639.01 × 133.49
  4. Step 4: Simplify right side
    426.00x = 85,302.37
  5. Step 5: Solve for x
    x = 85,302.37/426.00
  6. Step 6: Final answer
    x = 200.24

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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.