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Finding the Fourth Proportional to 383.38, 528.98 and 217.56

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Solution

The fourth proportional to 383.38, 528.98 and 217.56 is: 300.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.38 : 528.98 = 217.56 : x
  2. Step 2: Convert to fraction form
    383.38/528.98 = 217.56/x
  3. Step 3: Cross multiply
    383.38x = 528.98 × 217.56
  4. Step 4: Simplify right side
    383.38x = 115,082.24
  5. Step 5: Solve for x
    x = 115,082.24/383.38
  6. Step 6: Final answer
    x = 300.18

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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.