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Finding the Fourth Proportional to 367.90, 551.82 and 111.40

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Solution

The fourth proportional to 367.90, 551.82 and 111.40 is: 167.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.90 : 551.82 = 111.40 : x
  2. Step 2: Convert to fraction form
    367.90/551.82 = 111.40/x
  3. Step 3: Cross multiply
    367.90x = 551.82 × 111.40
  4. Step 4: Simplify right side
    367.90x = 61,472.75
  5. Step 5: Solve for x
    x = 61,472.75/367.90
  6. Step 6: Final answer
    x = 167.09

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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.