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Finding the Fourth Proportional to 383.72, 529.46 and 217.87

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Solution

The fourth proportional to 383.72, 529.46 and 217.87 is: 300.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.72 : 529.46 = 217.87 : x
  2. Step 2: Convert to fraction form
    383.72/529.46 = 217.87/x
  3. Step 3: Cross multiply
    383.72x = 529.46 × 217.87
  4. Step 4: Simplify right side
    383.72x = 115,353.45
  5. Step 5: Solve for x
    x = 115,353.45/383.72
  6. Step 6: Final answer
    x = 300.62

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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.