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Finding the Fourth Proportional to 64.54, 96.67 and 28.49

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Solution

The fourth proportional to 64.54, 96.67 and 28.49 is: 42.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.54 : 96.67 = 28.49 : x
  2. Step 2: Convert to fraction form
    64.54/96.67 = 28.49/x
  3. Step 3: Cross multiply
    64.54x = 96.67 × 28.49
  4. Step 4: Simplify right side
    64.54x = 2,754.14
  5. Step 5: Solve for x
    x = 2,754.14/64.54
  6. Step 6: Final answer
    x = 42.68

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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.