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Finding the Fourth Proportional to 34.59, 51.78 and 28.97

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Solution

The fourth proportional to 34.59, 51.78 and 28.97 is: 43.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.59 : 51.78 = 28.97 : x
  2. Step 2: Convert to fraction form
    34.59/51.78 = 28.97/x
  3. Step 3: Cross multiply
    34.59x = 51.78 × 28.97
  4. Step 4: Simplify right side
    34.59x = 1,500.07
  5. Step 5: Solve for x
    x = 1,500.07/34.59
  6. Step 6: Final answer
    x = 43.37

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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.