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Finding the Fourth Proportional to 325.36, 487.60 and 132.88

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Solution

The fourth proportional to 325.36, 487.60 and 132.88 is: 199.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.36 : 487.60 = 132.88 : x
  2. Step 2: Convert to fraction form
    325.36/487.60 = 132.88/x
  3. Step 3: Cross multiply
    325.36x = 487.60 × 132.88
  4. Step 4: Simplify right side
    325.36x = 64,792.29
  5. Step 5: Solve for x
    x = 64,792.29/325.36
  6. Step 6: Final answer
    x = 199.14

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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.