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Finding the Fourth Proportional to 383.67, 529.53 and 217.85

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Solution

The fourth proportional to 383.67, 529.53 and 217.85 is: 300.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.67 : 529.53 = 217.85 : x
  2. Step 2: Convert to fraction form
    383.67/529.53 = 217.85/x
  3. Step 3: Cross multiply
    383.67x = 529.53 × 217.85
  4. Step 4: Simplify right side
    383.67x = 115,357.02
  5. Step 5: Solve for x
    x = 115,357.02/383.67
  6. Step 6: Final answer
    x = 300.67

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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.