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Finding the Fourth Proportional to 278.02, 383.78 and 184.86

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Solution

The fourth proportional to 278.02, 383.78 and 184.86 is: 255.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.02 : 383.78 = 184.86 : x
  2. Step 2: Convert to fraction form
    278.02/383.78 = 184.86/x
  3. Step 3: Cross multiply
    278.02x = 383.78 × 184.86
  4. Step 4: Simplify right side
    278.02x = 70,942.73
  5. Step 5: Solve for x
    x = 70,942.73/278.02
  6. Step 6: Final answer
    x = 255.17

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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.