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Finding the Fourth Proportional to 383.62, 529.40 and 217.83

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Solution

The fourth proportional to 383.62, 529.40 and 217.83 is: 300.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.62 : 529.40 = 217.83 : x
  2. Step 2: Convert to fraction form
    383.62/529.40 = 217.83/x
  3. Step 3: Cross multiply
    383.62x = 529.40 × 217.83
  4. Step 4: Simplify right side
    383.62x = 115,318.11
  5. Step 5: Solve for x
    x = 115,318.11/383.62
  6. Step 6: Final answer
    x = 300.61

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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.