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Finding the Fourth Proportional to 237.79, 327.87 and 154.78

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Solution

The fourth proportional to 237.79, 327.87 and 154.78 is: 213.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.79 : 327.87 = 154.78 : x
  2. Step 2: Convert to fraction form
    237.79/327.87 = 154.78/x
  3. Step 3: Cross multiply
    237.79x = 327.87 × 154.78
  4. Step 4: Simplify right side
    237.79x = 50,747.72
  5. Step 5: Solve for x
    x = 50,747.72/237.79
  6. Step 6: Final answer
    x = 213.41

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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.