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Finding the Fourth Proportional to 184.84, 277.28 and 76.72

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Solution

The fourth proportional to 184.84, 277.28 and 76.72 is: 115.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.84 : 277.28 = 76.72 : x
  2. Step 2: Convert to fraction form
    184.84/277.28 = 76.72/x
  3. Step 3: Cross multiply
    184.84x = 277.28 × 76.72
  4. Step 4: Simplify right side
    184.84x = 21,272.92
  5. Step 5: Solve for x
    x = 21,272.92/184.84
  6. Step 6: Final answer
    x = 115.09

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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.