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Finding the Fourth Proportional to 323.60, 485.46 and 104.28

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Solution

The fourth proportional to 323.60, 485.46 and 104.28 is: 156.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.60 : 485.46 = 104.28 : x
  2. Step 2: Convert to fraction form
    323.60/485.46 = 104.28/x
  3. Step 3: Cross multiply
    323.60x = 485.46 × 104.28
  4. Step 4: Simplify right side
    323.60x = 50,623.77
  5. Step 5: Solve for x
    x = 50,623.77/323.60
  6. Step 6: Final answer
    x = 156.44

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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.