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Finding the Fourth Proportional to 34, 50.78 and 28.87

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Solution

The fourth proportional to 34, 50.78 and 28.87 is: 43.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    34 : 50.78 = 28.87 : x
  2. Step 2: Convert to fraction form
    34/50.78 = 28.87/x
  3. Step 3: Cross multiply
    34x = 50.78 × 28.87
  4. Step 4: Simplify right side
    34x = 1,466.02
  5. Step 5: Solve for x
    x = 1,466.02/34
  6. Step 6: Final answer
    x = 43.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.