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Finding the Fourth Proportional to 383.03, 528.58 and 217.24

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Solution

The fourth proportional to 383.03, 528.58 and 217.24 is: 299.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.03 : 528.58 = 217.24 : x
  2. Step 2: Convert to fraction form
    383.03/528.58 = 217.24/x
  3. Step 3: Cross multiply
    383.03x = 528.58 × 217.24
  4. Step 4: Simplify right side
    383.03x = 114,828.72
  5. Step 5: Solve for x
    x = 114,828.72/383.03
  6. Step 6: Final answer
    x = 299.79

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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.