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Finding the Fourth Proportional to 367.87, 551.56 and 136.72

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Solution

The fourth proportional to 367.87, 551.56 and 136.72 is: 204.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.87 : 551.56 = 136.72 : x
  2. Step 2: Convert to fraction form
    367.87/551.56 = 136.72/x
  3. Step 3: Cross multiply
    367.87x = 551.56 × 136.72
  4. Step 4: Simplify right side
    367.87x = 75,409.28
  5. Step 5: Solve for x
    x = 75,409.28/367.87
  6. Step 6: Final answer
    x = 204.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.