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Finding the Fourth Proportional to 49.30, 68.33 and 47.09

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Solution

The fourth proportional to 49.30, 68.33 and 47.09 is: 65.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.30 : 68.33 = 47.09 : x
  2. Step 2: Convert to fraction form
    49.30/68.33 = 47.09/x
  3. Step 3: Cross multiply
    49.30x = 68.33 × 47.09
  4. Step 4: Simplify right side
    49.30x = 3,217.95
  5. Step 5: Solve for x
    x = 3,217.95/49.30
  6. Step 6: Final answer
    x = 65.28

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.