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Finding the Fourth Proportional to 383.50, 529.15 and 217.67

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Solution

The fourth proportional to 383.50, 529.15 and 217.67 is: 300.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.50 : 529.15 = 217.67 : x
  2. Step 2: Convert to fraction form
    383.50/529.15 = 217.67/x
  3. Step 3: Cross multiply
    383.50x = 529.15 × 217.67
  4. Step 4: Simplify right side
    383.50x = 115,180.28
  5. Step 5: Solve for x
    x = 115,180.28/383.50
  6. Step 6: Final answer
    x = 300.34

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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.