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Finding the Fourth Proportional to 29.03, 39.70 and 28.91

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Solution

The fourth proportional to 29.03, 39.70 and 28.91 is: 39.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.03 : 39.70 = 28.91 : x
  2. Step 2: Convert to fraction form
    29.03/39.70 = 28.91/x
  3. Step 3: Cross multiply
    29.03x = 39.70 × 28.91
  4. Step 4: Simplify right side
    29.03x = 1,147.73
  5. Step 5: Solve for x
    x = 1,147.73/29.03
  6. Step 6: Final answer
    x = 39.54

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.