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Finding the Fourth Proportional to 325.92, 488.55 and 143.46

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Solution

The fourth proportional to 325.92, 488.55 and 143.46 is: 215.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.92 : 488.55 = 143.46 : x
  2. Step 2: Convert to fraction form
    325.92/488.55 = 143.46/x
  3. Step 3: Cross multiply
    325.92x = 488.55 × 143.46
  4. Step 4: Simplify right side
    325.92x = 70,087.38
  5. Step 5: Solve for x
    x = 70,087.38/325.92
  6. Step 6: Final answer
    x = 215.04

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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.