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Finding the Fourth Proportional to 367.79, 551.60 and 107.80

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Solution

The fourth proportional to 367.79, 551.60 and 107.80 is: 161.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.79 : 551.60 = 107.80 : x
  2. Step 2: Convert to fraction form
    367.79/551.60 = 107.80/x
  3. Step 3: Cross multiply
    367.79x = 551.60 × 107.80
  4. Step 4: Simplify right side
    367.79x = 59,462.82
  5. Step 5: Solve for x
    x = 59,462.82/367.79
  6. Step 6: Final answer
    x = 161.67

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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.