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Finding the Fourth Proportional to 34.78, 52.08 and 28.32

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Solution

The fourth proportional to 34.78, 52.08 and 28.32 is: 42.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.78 : 52.08 = 28.32 : x
  2. Step 2: Convert to fraction form
    34.78/52.08 = 28.32/x
  3. Step 3: Cross multiply
    34.78x = 52.08 × 28.32
  4. Step 4: Simplify right side
    34.78x = 1,474.91
  5. Step 5: Solve for x
    x = 1,474.91/34.78
  6. Step 6: Final answer
    x = 42.41

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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.