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Finding the Fourth Proportional to 62.88, 94.24 and 28.64

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Solution

The fourth proportional to 62.88, 94.24 and 28.64 is: 42.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.88 : 94.24 = 28.64 : x
  2. Step 2: Convert to fraction form
    62.88/94.24 = 28.64/x
  3. Step 3: Cross multiply
    62.88x = 94.24 × 28.64
  4. Step 4: Simplify right side
    62.88x = 2,698.49
  5. Step 5: Solve for x
    x = 2,698.49/62.88
  6. Step 6: Final answer
    x = 42.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.