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Finding the Fourth Proportional to 29.34, 43.71 and 28.80

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Solution

The fourth proportional to 29.34, 43.71 and 28.80 is: 42.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.34 : 43.71 = 28.80 : x
  2. Step 2: Convert to fraction form
    29.34/43.71 = 28.80/x
  3. Step 3: Cross multiply
    29.34x = 43.71 × 28.80
  4. Step 4: Simplify right side
    29.34x = 1,258.85
  5. Step 5: Solve for x
    x = 1,258.85/29.34
  6. Step 6: Final answer
    x = 42.91

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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.