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Finding the Fourth Proportional to 458.26, 687.40 and 133.62

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Solution

The fourth proportional to 458.26, 687.40 and 133.62 is: 200.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.26 : 687.40 = 133.62 : x
  2. Step 2: Convert to fraction form
    458.26/687.40 = 133.62/x
  3. Step 3: Cross multiply
    458.26x = 687.40 × 133.62
  4. Step 4: Simplify right side
    458.26x = 91,850.39
  5. Step 5: Solve for x
    x = 91,850.39/458.26
  6. Step 6: Final answer
    x = 200.43

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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.