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Finding the Fourth Proportional to 458.88, 688.31 and 134.25

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Solution

The fourth proportional to 458.88, 688.31 and 134.25 is: 201.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.88 : 688.31 = 134.25 : x
  2. Step 2: Convert to fraction form
    458.88/688.31 = 134.25/x
  3. Step 3: Cross multiply
    458.88x = 688.31 × 134.25
  4. Step 4: Simplify right side
    458.88x = 92,405.62
  5. Step 5: Solve for x
    x = 92,405.62/458.88
  6. Step 6: Final answer
    x = 201.37

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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.