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Finding the Fourth Proportional to 278.08, 383.92 and 178.54

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Solution

The fourth proportional to 278.08, 383.92 and 178.54 is: 246.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.08 : 383.92 = 178.54 : x
  2. Step 2: Convert to fraction form
    278.08/383.92 = 178.54/x
  3. Step 3: Cross multiply
    278.08x = 383.92 × 178.54
  4. Step 4: Simplify right side
    278.08x = 68,546.01
  5. Step 5: Solve for x
    x = 68,546.01/278.08
  6. Step 6: Final answer
    x = 246.50

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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.