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Finding the Fourth Proportional to 76.79, 115.08 and 44.27

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Solution

The fourth proportional to 76.79, 115.08 and 44.27 is: 66.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.79 : 115.08 = 44.27 : x
  2. Step 2: Convert to fraction form
    76.79/115.08 = 44.27/x
  3. Step 3: Cross multiply
    76.79x = 115.08 × 44.27
  4. Step 4: Simplify right side
    76.79x = 5,094.92
  5. Step 5: Solve for x
    x = 5,094.92/76.79
  6. Step 6: Final answer
    x = 66.35

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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.