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Finding the Fourth Proportional to 229.60, 314.90 and 217.87

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Solution

The fourth proportional to 229.60, 314.90 and 217.87 is: 298.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.60 : 314.90 = 217.87 : x
  2. Step 2: Convert to fraction form
    229.60/314.90 = 217.87/x
  3. Step 3: Cross multiply
    229.60x = 314.90 × 217.87
  4. Step 4: Simplify right side
    229.60x = 68,607.26
  5. Step 5: Solve for x
    x = 68,607.26/229.60
  6. Step 6: Final answer
    x = 298.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.