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Finding the Fourth Proportional to 323.60, 485.16 and 215.12

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Solution

The fourth proportional to 323.60, 485.16 and 215.12 is: 322.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.60 : 485.16 = 215.12 : x
  2. Step 2: Convert to fraction form
    323.60/485.16 = 215.12/x
  3. Step 3: Cross multiply
    323.60x = 485.16 × 215.12
  4. Step 4: Simplify right side
    323.60x = 104,367.62
  5. Step 5: Solve for x
    x = 104,367.62/323.60
  6. Step 6: Final answer
    x = 322.52

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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.