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Finding the Fourth Proportional to 37.76, 56.56 and 28.68

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Solution

The fourth proportional to 37.76, 56.56 and 28.68 is: 42.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.76 : 56.56 = 28.68 : x
  2. Step 2: Convert to fraction form
    37.76/56.56 = 28.68/x
  3. Step 3: Cross multiply
    37.76x = 56.56 × 28.68
  4. Step 4: Simplify right side
    37.76x = 1,622.14
  5. Step 5: Solve for x
    x = 1,622.14/37.76
  6. Step 6: Final answer
    x = 42.96

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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.