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Finding the Fourth Proportional to 29.72, 44.28 and 28.56

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Solution

The fourth proportional to 29.72, 44.28 and 28.56 is: 42.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.72 : 44.28 = 28.56 : x
  2. Step 2: Convert to fraction form
    29.72/44.28 = 28.56/x
  3. Step 3: Cross multiply
    29.72x = 44.28 × 28.56
  4. Step 4: Simplify right side
    29.72x = 1,264.80
  5. Step 5: Solve for x
    x = 1,264.80/29.72
  6. Step 6: Final answer
    x = 42.55

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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.