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Finding the Fourth Proportional to 217.60, 299.88 and 162.28

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Solution

The fourth proportional to 217.60, 299.88 and 162.28 is: 223.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.60 : 299.88 = 162.28 : x
  2. Step 2: Convert to fraction form
    217.60/299.88 = 162.28/x
  3. Step 3: Cross multiply
    217.60x = 299.88 × 162.28
  4. Step 4: Simplify right side
    217.60x = 48,664.53
  5. Step 5: Solve for x
    x = 48,664.53/217.60
  6. Step 6: Final answer
    x = 223.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.