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Finding the Fourth Proportional to 35.09, 48.39 and 28.86

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Solution

The fourth proportional to 35.09, 48.39 and 28.86 is: 39.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.09 : 48.39 = 28.86 : x
  2. Step 2: Convert to fraction form
    35.09/48.39 = 28.86/x
  3. Step 3: Cross multiply
    35.09x = 48.39 × 28.86
  4. Step 4: Simplify right side
    35.09x = 1,396.54
  5. Step 5: Solve for x
    x = 1,396.54/35.09
  6. Step 6: Final answer
    x = 39.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.