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Finding the Fourth Proportional to 51.05, 76.58 and 43.49

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Solution

The fourth proportional to 51.05, 76.58 and 43.49 is: 65.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.05 : 76.58 = 43.49 : x
  2. Step 2: Convert to fraction form
    51.05/76.58 = 43.49/x
  3. Step 3: Cross multiply
    51.05x = 76.58 × 43.49
  4. Step 4: Simplify right side
    51.05x = 3,329.86
  5. Step 5: Solve for x
    x = 3,329.86/51.05
  6. Step 6: Final answer
    x = 65.23

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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.