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Finding the Fourth Proportional to 51.45, 77.06 and 28.60

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Solution

The fourth proportional to 51.45, 77.06 and 28.60 is: 42.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.45 : 77.06 = 28.60 : x
  2. Step 2: Convert to fraction form
    51.45/77.06 = 28.60/x
  3. Step 3: Cross multiply
    51.45x = 77.06 × 28.60
  4. Step 4: Simplify right side
    51.45x = 2,203.92
  5. Step 5: Solve for x
    x = 2,203.92/51.45
  6. Step 6: Final answer
    x = 42.84

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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.